Saturday, March 16, 2013

1.A photosynthesizing plant is releasing 18O more than the normal. The plant must have been supplied with
(a) O3
(b) H2O with 18O
(c) CO2 with 18O
(d) C6H12O6 with 18O
Answer: (b)
2.A plant is kept in 300 ppm CO2 concentration. What will happen to it (Rajasthan PMT 1985)
(a) Plant will die soon
(b) Plant will grow but will not die
(c) Plant will show normal photosynthesis
(d) Respiration will be greatly decreased
Answer: (c)
3.Activation radiation for photosynthesis are represented by wavelength of (CBSE 1996)
(a) 640-650 nm
(b) 600-950 nm
(c) 400-700 nm
(d) 340-450 nm
Answer: (c)
4.Aganal chloroplasts occur in
(a) C3 plants
(b) Hydrophytes
(c) C4 Plants
(d) Succulents
Answer : (c)
5.All plastids have essentially same structure because
(CBSE 1992)
(a) They have to perform same function
(b) They are localized in aerial parts of plants
(c) All plastids store starch, lipid and proteins
(d) One type of platid can be differentiated into another type of plastid depending on cell requirements
Answer: (d)
6.Assimilatory power produced in hill reaction and used in Blackman’s reaction refers to
(a) Generation of ATP and NADPH2
(b) Reduction of CO2
(c) Splitting of water
(d) Disintegration of plastids
Answer : (a)
7.Which wavelength of light carries out photosynthesis in bacteria (Rajasthan PMT 1985)
(a) Ultraviolet light
(b) Blue
(c) Red
(d) Far red
Answer: (d)
8.ATP is a source of energy for
(a) Light reaction in C4 plants
(b) Photophosphorylation
(c) Biochemical reactions
(d) Photolysis of water
Answer : (c)
9.Bacterial photosynthesis contains
(a) PSI
(b) PSII
(c) Both PSI and PSII
(d) None of them
Answer : (a)
10.Bacteriochlorophyll differs from chlorophyll ‘a’ in having (CPMT 1989)
(a) One pyrrol with one hydrogen
(b) One pyrrol with two hydrogen
(c) One pyrrol with three hydrogen
(d) One pyrrol with four hydrogen
Answer: (b)
11.Besides water and light, which is more essential as a raw material for food formation (BHU 1979)
(a) O2
(b) CO2
(c) Mineral salts
(d) NAD
Answer: (b)
12.Both respiration and photosynthesis require
(a) Sunlight
(b) Green cells
(c) cytochromes
(d) Organic substrate
Answer : (c)
13.C4 cycle was discovered by
(a) Hill
(b) Calvin
(c) Hatch and slack
(d) Blackman
Answer : (c)
14.C4 plants are adapted to (AIIMS 1984)
(a) Hot ad dry climate
(b) Temperate climate
(c) Cold and dry climate
(d) Hot and humid climate
Answer: (a)
15.C4 plants belong to
(a) Gramineae
(b) Monocots
(c) Dicots
(d) Both monocots and Dicots
Answer : (d)
16.Calvin cycle occurs in (MP PMT 1996)
(a) Chloroplast
(b) Cytoplasm
(c) Mitochondria
(d) Glyoxysomes
Answer: (a)
17.Calvin cycle occurs in (BHU 1983)
(a) Chloroplasts
(b) Cytoplasm
(c) Mitochondria
(d) Glyoxysomes
Answer : (a)
18.Calvin’s cycle is found in (Raj. PMT 1997)
(a) Only C3 plants
(b) Only photosynthetic plants
(c) All C4 plants
(d) All photosynthetic plants
Answer: (d)
19.CAM photosynthesis occurs in plants with
(MP PMT 1993)
(a) Thin green leaves with reticulate venation
(b) Thin green leaves with parallel venation
(c) Fleshy green leaves
(d) Thin coloured leaves
Answer: (c)
20.Carbon dioxide is fixed in (MP PMT 1999)
(a) Light reaction
(b) Dark reaction
(c) Aerobic respiration
(d) Anaerobic respiration
Answer: (b)

Bundle sheath chloroplast of C4 plants are Large and agranal

1. The head and tail of chlorophyll are made up of
(A) Pyrrole and tetrapyrrole
(B) Porphyrine and phytin
(C) Pophyrine and phytol
(D) Tetrapyrrole and magnesium
Answer: (C)
2. The numbner of photons needed for the evolution of one molecule of oxygen is
(A) 8
(B) 2
(C) 12
(D) 18
Answer: (A)
3. Action spectrum is
(A) A graph showing amount of light absorbed
(B) A graph showing rate of photosynthesis
(C) A graph showing absorption of light
(D) A graph showing amount of CO2 released
Answer: (B)
4. C40H56O2 is molecular formula of
(A) Xanthophyll
(B) Carotenes
(C) Chlorophylls
(D) Phycobillins
Answer: (A)
5. Quantasome contains
(A) 150-200 chlorophyll molecules
(B) 200 chlorophyll molecules
(C) 230-250 chlorophyll molecules
(D) 300-350 chlorophyll molecules
Answer: (C)
6. The rate of photosynthesis is maximum in
(A) Blue light
(B) Red light
(C) Green light
(D) Violet light
Answer: (B)
7. Agranal chloroplast is seen in
(A) Bundle sheath cells
(B) Mesophyll cells
(C) Both (A) and (B)
(D) Epidermal cell
Answer: (A)
8. The malic acid in bundle sheath chloroplast of C4 plants is decarboxylated to form
(A) OAA
(B) Pyruvic acid
(C) PEPA
(D) Aspartic acid
Answer: (B)
9. How many Calvin’s cycle form one glucose molecule
(A) 2
(B) 6
(C) 4
(D) 8
Answer: (B)
10. CO2 fixing enzymes are present in
(A) Stroma lamella
(B) Grana lamella
(C) Quantasome
(D) Stroma
Answer: (D)
11. PGA is the first stable compound formed in
(A) C3 pathway
(B) Mesophyll
(C) C4 pathway
(D) Both (B) and (C)
Answer: (A)
12. The organisms that photosynthesizes but do not evolve any molecular oxygen during the process
(A) Blue green algae
(B) Mango plant
(C) Sulphur bacteria
(D) Both (A) and (C)
Answer: (C)
13. C4 plants show very high rate of photosynthesis as compare to C3 plants, because of
(A) Dicarboxylation
(B) Bundle sheath cells
(C) Absence of photorespiration
(D) All the above
Answer: (C)
14. During photsynthesis, the oxygen in glucose comes from
(A) Carbon dioxide
(B) Water
(C) Both (A) and (B)
(D) Oxygen
Answer: (A)
15. Dark reaction require light reaction for
(A) Carboxylation of RUDP
(B) Reduction of PGA
(C) Formation of hexose phosphate
(D) Regeneration of RUBP
Answer: (B)
16. Erythrose monophosphate (4C) is formed during
(A) CAM pathway
(B) C4 pathway
(C) Conversion of fructose to glucose
(D) Regeneration of RUDP
Answer: (D)
17. Donor and acceptor of electrons is the same chlorophyll molecule in
(A) Cyclic phtophosphorylation
(B) Photorespiration
(C) Substrate level phosphorylation
(D) Non-cyclic photophosphorylation
Answer: (A)
18. If a photosynthsing plant releases O18, it is concluded that the plant has been supplied with
(A) Water containing O18
(B) Oxygen in the form of ozone
(C) Sugar containing O18
(D) Carbon dioxide containing O18
Answer: (A)
19. Which of the following connet the primary and secondary processes of photosynthesis?
(A) NADPH2
(B) ATP and NADPH2
(C) ATP
(D) Ferridoxins
Answer: (B)
20. C4 plants can perform photosynthesis
(A) Even in low light intensity
(B) Even in low CO2 concentration
(C) Both (A) and (B)
(D) Only in high intensity of light and high CO2
Answer: (B)
21. Chemical which absorbs light energy and changes it to chemical energy is
(A) Chlorophyll a
(B) Chlorophyll b
(C) Xanthophyll
(D) Carotene
Answer: (A)
22.
In Hill’s experiment, Hill used ______ as oxygen acceptor,
(A) Hydrogen
(B) FAD
(C) NADP
(D) Haemoglobin
Answer: (D)
23. Fret channel is a another name for
(A) Stroma lamellae
(B) Intergranal lamellae
(C) Grana lamellae
(D) Space present in stroma lamellae
Answer: (D)
24. Bundle sheath chloroplast of C4 plants are
(A) Large and agranal
(B) Large and granal
(C) Small and granal
(D) Small and agranal
Answer: (A)
25. In C3 pathway, out of 12 molecules of 3-PGAL, how many are used for regeneration of RUDP?
(A) 12
(B) 8
(B) 10
(B) 6
Answer: (C)

The prerequisities of Calvins cycle are CO2, ATP, NADPH2

1. What happens during light reaction
(A) CO2 reacts with H2
(B) Synthesis of PGAL
(C) Lysis of water molecule
(D) CO2 combines with H2O
Answer: (C)
2. Photosynthesis takes place
(A) Only in green light
(B) Only in sunlight
(C) In visible light obtained from any source
(D) Only in high intensity of light
Answer: (C)
3. Chlorophyll-a differes from chlorophyll-b in having---
(A) Methly group instead of aldehyde group
(B) Aldehyde group instead of methyl group
(C) Methyl group instead of ethyl group
(D) Only phytol tail instead of head
Answer: (A)
4. In non-cyclic photophosphorylation
(A) ATP is generated
(B) Both PSI and PSII are involved
(C) Electron flow is unidirectional
(D) All the above
Answer: (D)
5. During photosynthesis the reaction when PGA is converted into PGAL, is called
(A) Isomerization
(B) Reduction
(C) Oxidation
(D) Phosphorylation
Answer: (B)
6. In C3 pathway, the first stable compound is
(A) PGAL
(B) OAA
(C) PGA
(D) RUDP
Answer: (C)
7. In con-cyclic photophosphorylation, the electron emitted by P680 is replaced by electron from
(A) NADP
(B) Water
(C) Ferridoxin
(D) Chlorophyll-a
Answer: (B)
8. 85-90% (9/10) of all photosynthesis in the world is carried out by
(A) Shrubs
(B) Algae of the oceans
(C) Herbs
(D) Scientists in the laboratory
Answer: (B)
9. The source of oxygen evolved during photosynthesis is
(A) H2O
(B) CO2
(C) chl-a
(D) glucose
Answer: (A)
10. In C4 plants, synthesis of glucose occurs in
(A) Spongy cells
(B) Bundle sheath cells
(C) Mesophyll cells
(D) Palisade cells
Answer: (B)
11. In cyclic and non-cyclic photophosphorylation, the first acceptor of electron are
(A) Plastoquinone and ferridoxin
(B) Cyt b6 and cyt. f
(C) Ferridoxin in both
(D) Ferridoxin and plastoquinone respt.
Answer: (D)
12. Primary and secondary processes of Photosynthesis takes place in ______ and ______ respectively.
(A) Stroma and grana
(B) Stroma and lamellae
(C) Thylakoid and quantasome
(D) Grana and stroma
Answer: (D)
13. Which one occurs during both cyclic and non-cyclic photophosphorylation
(A) Formation of ATP
(B) Release of O2
(C) Formation of NADPH2
(D) Involvement of both PSI and PSII
Answer: (A)
14. The prerequisities of Calvins cycle are
(A) H2O, CO2, ATP
(B) ATP, H2O, NADPH2
(C) CO2, ATP, NADPH2
(D) NADPH2, H2O, CO2
Answer: (C)
15. The photochemical process in photosynthesis which needs both PSI and PSII also involves
(A) Photolysis of water
(B) Z-scheme of electron transfer
(C) Synthesis of assimilatory power
(D) All of these
Answer: (D)
16. For synthesis of one molecule of glucose, the requirement of ATP and NADPH2 is respectively
(A) 15 and 10
(B) 12 and 8
(C) 30 and 15
(D) 18 and 12
Answer: (D)
17. Which of the following element is needed for chlorophyll biosynthesis?
(A) Copper
(B) Magnesium
(C) Calcium
(D) Chlorine
Answer: (B)
18. In the calvin cycle, the assimilatory power is used during
(A) Formation of 3-PGA
(B) Conversion of 3-PGA to 3-PGAL
(C) Formation of fructose 1-6 diphsophate from PGAL
(D) Formation of glucose from fructose 1-6 diphosphate
Answer: (B)
19. The two enzymes responsible for primary carboxylation in C3 and C4 pathway, respectively are
(A) RUBP carboxylase and RUBP oxygenase
(B) PEP carboxylase and RUBP carboxylase
(C) RUBP carboxylase and PEP carboxylase
(D) PEP carboxylase and pyruvate carboxylase
Answer: (C)
20. _______ are placed one above the other to form stack of coins
(A) oxysomes
(B) F1 particles
(C) cristae
(D) thylakoids
Answer: (D)
21. During Photosynthesis
(A) Both CO2 and water get oxidised
(B) Both CO2 and water get reduced
(C) Water is oxidised and CO2 is reduced
(D) Water reduced and CO2 is oxidized
Answer: (C)
22. Unidirectional flow of e- in non-cyclic photophosphorylation is
(A) PS II PS I NADP water
(B) Water PSII PS I NADP
(C) PS I NADP water PS II
(D) Water PS I PS II NADP
Answer: (B)
23. ATP synthesis during light reaction is
(A) Photophosphorylation
(B) Photolysis
(C) Oxidative phosphorylation
(D) Phosphorylation
Answer: (A)
24. In photosynthesis, the first step is
(A) Phtolysis of water
(B) Production of NADPH2
(C) Photoexcitation of chlorophyll
(D) Synthesis of ATP
Answer: (C)
25. Calvin was given Nobel prize in 1961 for his discovery of
(A) Mode of carbon fixation
(B) Photosynthesis
(C) Photolysis of water
(D) Light reaction
Answer: (A)

Calvins cycle involves Reductive carboxylation

1. C55H70O6N4 Mg is
(A) An accessory pigment in photosynthesis
(B) Present in PS-II
(C) Present in all green plants
(D) All of these
Answer: (D)

2. The ionized chl.a+
(A) Receives low energy electron
(B) Receives high energy electron
(C) Expels low energy electron
(D) Expels high energy electron
Answer: (A)

3. In Calvin cycle,
(A) fructose 1,6 diphophate undergoes dephosphorylation.
(B) ATP is formed during dephosphoylation of fructose
(C) 1,3 di PGA undergo phosphorylation
(D) none of these
Answer: (A)

4. What will happen to the rate of photosynthesis if sodium bicarbonate is added in the water having hydrilla plant in a beaker
(A) It will remain normal
(B) It will be decreased
(C) It will be stopped
(D) It will be accelerated
Answer: (D)

5. Which of the following gas would disappear from the atmosphere if all the photosynthetic activities were to stop?
(A) Nitrogen
(B) Carbondioxide
(C) Hydrogen
(D) Oxygen
Answer: (D)

6. Photo-oxidation of chlorophyll and cell contents as a result of high light intensity is known as
(A) Solarization
(B) Photolysis
(C) Photperiodism
(D) Photorespiration
Answer: (A)

7. Temperature is very high but a plant is showing photosynthesis with normal rate, probably it would be
(A) C3 plant
(B) Mango plant
(C) Pea plant
(D) Sugarcane plant
Answer: (D)

8. For the process of photosynthesis all except one of the following items are essential. Point out the exception
(A) CO2, optimum temperature
(B) Glucose and oxygen
(C) Water and minerals
(D) Light and chlorophyll
Answer: (B)

9. The prerequisities of Calvins cycle are
(A) H2O, CO2, ATP
(B) ATP, H2O, NADPH2
(C) CO2, ATP, NADPH2
(D) NADPH2, H2O, CO2
Answer: (C)

10. In the calvin cycle, the assimilatory power is used during
(A) Formation of PGA
(B) Conversion of PGA to PGAL
(C) Formation of fructose 1-6 diphsophate from PGAL
(D) Formation of glucose from fructose – di- phosphate
Answer: (B)

11. Unidirectional flow of e- in non-cyclic photophosphorylation is
(A) PS II -- e- ---> PS I -- e- ---> NADP -- e- ---> water
(B) Water -- e- ---> PSII -- e- ---> PS I -- e- ---> NADP
(C) PS I -- e- ---> NADP -- e- ---> water -- e- ---> PS II
(D) Water -- e- ---> PS I -- e- ---> PS II -- e- ---> NADP
Answer: (B)

12. Which is sensitive to longer wavelength of light?
(A) Photolysis
(B) PSI
(C) PS II
(D) Photophosphorylation
Answer: (B)

13. Phytol tail is present at
(A) 3rd carbon of IInd ring
(B) 2nd carbon of IIIrd ring
(C) 7th carbon of IVth ring
(D) 3rd carbon of IVth ring
Answer: (C)

14. Reduction of co-enzyme NADP depends on
(A) Reduction of CO2
(B) Evolution of O2
(C) Photolysis of water
(D) Formation of ATP
Answer: (C)

15. Loculus is the internal space of
(A) Grana
(B) Stroma
(C) Thylakoid
(D) Quantasome
Answer: (C)

16. Calvins cycle involves
(A) Oxidative phosphorylation
(B) Oxidative carboxylation
(C) Reductive carboxylation
(D) Reductive phophorylation
Answer: (C)

17. In C4 plants, carboxylation is twice, it can be represented as
(A) Pyruvic acid + CO2 malic acid + CO2
(B) RUDP + CO2 and pyruvic acid + CO2
(C) PEPA + CO2 and RUDP + CO2
(D) PEPA + CO2 and malic acid + CO2
Answer: (C)

18. In non-cyclic photophosphorylation, all the participants acts as electron donor and acceptor except
(A) Chl-a of PS I
(B) Chl-a of PS II
(C) NADP
(D) Both (A) and (B)
Answer: (C)

19. Ribbon shaped chloroplast is present in
(A) Zygnema
(B) Spirogyra
(C) Chlorobium
(D) Chromatinum
Answer: (B)

20. Which of the following protist is a photoautotroph
(A) Thiobacillus
(B) Ferrobacillus
(C) Diatoms
(D) Chlorobium
Answer: (C)

Quantum yield of photosynthesis is 12.5%.

1.Sugar moves in phloem vessels as ______.
(a) cellulose
(b) glucose
(c) starch
(d) sucrose

Answer: (d) Glucose is called principle carbohydrate, sucrose is called translocable carbohydrate, starch is called storage carbohydrate and cellulose is called structural carbohydrate

2.______ ions help in photolysis of water.
(a) Mn++
(b) Mg++
(c) Cl-
(d) both (a) and (c)
Answer: (d) Magnoprotein is associated with photolysis of water, which contains Mn++ and Cl- as cofactor.

3.RUBISCO enzyme is also called as ______.
(a) carboxytetra mutase
(b) carboxydimutase
(c) carboxytrimutase
(d) carboxyunimutase
Answer: (b) RUBISCO is called marker enzyme of chloroplast since it can perform carboxylation as well as oxidation, therefore also called carboxydimutase.

4.______ is precursor for abscissic acid (ABA)
(a) Zeatin
(b) Lutein
(c) Violaxanthin
(d) Mevalonic acid
Answer: (c) Precursor for the biosynthesis of abscissic acid is violaxanthin, a type of xanthophyll found in leaves.

5.In young leaves ratio of carotene to Xanthophyll is ____.
(a) 2 : 1
(b) 3: 1
(c) 1: 3
(d) 1: 2
Answer: (d) In young leaves cuticle is thin hence require more production therefore concentration of Xanthophyll is more than carotene which is more protective

6.Which of the following pigments contains open pyrolle ring?
(a) Phycobilins
(b) Xanthophylls
(c) Chlorophylls
(d) β-carotene
Answer: (a) Chlorophylls are made of closed pyrolle, whereas Phycobilins are made of open pyrolle, Carotenoids are carbon hydrogen derivatives.

7.In which of the following light, rate of photosynthesis is maximum?
(a) white
(b) discontinuous white
(c) red
(d) blue
Answer: (b) Discontinuous white light or intermittent light don’t increase the temperature, hence the rate of photosynthesis is maximum.

8.Quantum yield of photosynthesis is ______.
(a) 13.5 %
(b) 8 %
(c) 13%
(d) 12.5%
Answer: (d) Quantum requirement of photosynthesis is 8 quanta, whereas quantum yield is 1/8 x 100 i.e., 12.5%

9.During light phase of photosynthesis ______ is oxidized and ______ is reduced.
(a) CO2 and Water
(b) Water and CO2
(c) Water and NADP
(d) NADPH2 and CO2
Answer: (c) During light phase water is oxidized and the released hydrogen is accepted by NADP, hence is reduced to NADPH2.

10.During dark phase of photosynthesis ______ is oxidized and ______ is reduced
(a) CO2 and Water
(b) Water and CO2
(c) Water and NADP
(d) NADPH2 and CO2
Answer: (d) During dark phase the reduced NADPH2 transfer its hydrogen to CO2 which is reduced to carbohydrate.

11.The visible product of photosynthesis is ______.
(a) glucose
(b) cellulose
(c) starch
(d) fructose
Answer: (c) Starch is visible product since it can be stained with iodine.

12.To produce 3 glucose molecules ______ ATP and ______ NADPH2 molecules are required.
(a) 54, 36
(b) 54, 30
(c) 36, 60
(d) 18, 12
Answer: (a) 1 glucose molecule requires 18 ATP and 12 NADPH2

13.Glycolytic reversal is a part of ______.
(a) aerobic respiration
(b) anaerobic respiration
(c) light phase of photosynthesis
(d) dark phase of photosynthesis
Answer: (d) First phase of calvin cycle is called glycolytic reversal, which is a part of dark phase of photosynthesis.

14.RuBp carboxylase acts as RuBp carboxygenase at ______ CO2 conc. And ______ O2 conc.
(a) low, low
(b) low, high
(c) high, high
(d) high, low
Answer: (b) During photorespiration RUBP carboxylase acts RUBP oxygenase under low CO2 High O2 concentrations.

15.The source of CO2 during calvin cycle in C4 plant is
(a) Malic acid
(b) OAA
(c) PEP
(d) RuDP
Answer: (a) During C4 pathway malic acid undergo decarboxylaton to release CO2.

16.Dicot which follow C4 pathway is____.
(a) wheat
(b) Amranthus
(c) Maize
(d) Mango
Answer: (b) Most of the C4 plant is monocot however exceptional dicot is Amaranthus.

17.Absorption spectrum of chlorophyll is maximum in _____ light.
(a) red
(b) blue
(c) yellow
(d) blue-violet
Answer: (b) Absorption spectrum of chlorophyll is maximum in blue light whereas action spectrum is maximum in red light.

18.The oxygen molecule in glucose formed during photosynthesis comes from
(a) Water
(b) Organic acids
(c) CO2
(d) atmosphere
Answer: (c) Since glucose is formed form CO2 and hydrogen released from water hence oxygen comes from CO2.

19.Dimorphic chloroplast are present in ______.
(a) zeamays
(b) sacchrum officinale
(c) sorghum bicolor
(d) all of these
Answer: (d) Dimorphic chloroplast or Kranz anatomy is the character feature of monocot, All the given options are monocot.

20.Red pigment in tomato is
(a) b-carotene
(b) Anthocyanin
(c) Lycopene
(d) Lutein
Answer: (c) the biological name of the tomato is lycopersicon esculentum it is due the ther lycopene.

21.Solarisation refers to ______.
(a) formation of sugar with help of water or energy
(b) destruction of chlorophyll
(c) synthesis of chl.
(d) both b and c
Answer: (b) Destruction of chlorophyll is due harmful light and oxygen called solarization.

22.Dark reaction requires light reaction for
(a) carboxylation of RUBP
(b) regeneration of RUBP
(c) reduction of PGA
(d) formation of hexose sugar
Answer: (c) Product of dark reaction is NADPH2 required for reduction of PGA to PGAL

23.Emerson effect proves
(a) concept of two photosystem in plant
(b) photophosphorylation
(c) photorespiration
(d) there are light and dark reaction in photosynthesis
Answer: (a) The concept of two photosystem in plant was proposed by emerson bases on red drop effect and enhancement effect.

24.Name a plant which do not perform photosynthesis is
(a) Algae
(b) Bryophyllum
(c) cuscutta
(d)Pitcher plant
Answer: (d) Cuscutta is a parasite.

25.Light reaction of photosynthesis results in formation of ______.
(a) O2
(b) NADPH + H+
(c) ATP
(d) All of these
Answer: (d) During light phase ATP and NADPH is product where as oxygen is byproduct produced during light phase.

The chemical nature of kinetin is 6-furfuryl amino purine

1. Richmond – Lang effect is
(A) Morphogenesis
(B) Delay of senescence under control of cytokinin
(D) Induction of early flowering
(D) Protection of organs
Answer: (B)

2. Who repoted that cononut milk contains cytokinins
(A) Skoog
(B) Miller
(C) Steward
(D) Thiamann
Answer: (A)

3. The chemical nature of kinetin is
(A) Indole acetic acid
(B) Mesopentyl adenine
(C) 6-furfuryl amino purine
(D) CH2 = CH2
Answer: (C)

4. The ripening harmone is
(A) Auxin
(B) Ethylene
(C) GA
(D) ABA
Answer: (B)

5. The only gaseous harmone in plants is
(A) Auxin
(B) GA
(C) ABA
(D) Ethylene
Answer: (D)

6. Amino acid methionine is the precusor for
(A) Ethylene
(B) ABA
(C) GA
(D) Auxin
Answer: (A)

7. If the dark phase of a shortday plant is intrupted by a flash of light then
(A) It will Flower
(B) Will not flower
(C) produve vernalin
(D) Al of these
Answer: (B)

8. Photoperiodism is associated with synthesis of
(A) Vernalin
(B) Colchicine
(C) abscissin
(D) Florigen
Answer: (D)

9. 2,4-D is used as
(A) Florigen
(B) Vernalin
(C) Herbicide
(D) Fungicide
Answer: (C)

10. Which of the folowing hormone is polar.
(A) Ethylene
(B) ABA
(C) GA
(D) Cytokinin.
Answer: (D)

11. The type of germination in which cotyledons come above the ground is called as
(A) Epigeal
(B) Hypogeal
(C) Viviparpus
(D) Oviparous
Answer: (A)

12. In most of monocot plants, germination is
(A) Epigeal
(B) Hypogeal
(C) Viviparous
(D) Hydrogeal
Answer: (B)

13. Emergence of radicle and plumule from seed is called
(A) Pregemination
(B) Post germination
(C) Germination
(D) Dormancy
Answer: (C)

14. In stratification, dormant seeds are kept at
(A) Very high temp
(B) Low temperature(0-100C)
(C) Under aerated condition
(D) Optimum temperature
Answer: (B)

15. Longevity of seed can be prolonged by keeping them at
(A) Dry condition and low temperature
(B) Humidity and low temperature
(C) Low temperature and dryness
(D) High temperature
Answer: (B)

16. The resumption of active growth of embryo is called as
(A) Germination
(B) Growth
(C) Quiescence
(D) Viability
Answer: (A)

17. Longevity of seeds of lotus is
(A) 1year
(B) 10 years
(C) 100 years
(D) 1000 years
Answer: (D)

18. Innate seed dormancy is
(A) Caused due to internal factors
(B) Different from quiescence
(C) Called primary dormancy
(D) All the above
Answer: (D)

19. A seed which is just waiting for favourable environmental condition to germinate is called
(A) Dormant seed
(B) Quiescent seed
(C) Non-viable seed
(D) Dead seed
Answer: (B)

20. Seed are subjected to hydraulic pressure at 2000 atm. To
(A) Increase permeability of seed coat to water
(B) Break seed coat
(C) Completion of after ripening period
(D) Leach out the germination inhibitors
Answer: (A)

Epigeal germination is found in Castor

1. Who classified the plants into different categories on the basis of photoperiodic responses
(A) benthem and Hooker
(B) cajlachjan
(C) Garner and Allard
(D) Linneus
Answer: (C)

2. The plant which needs light period shorter than critical period is called
(A) Short day plant(SDP)
(B) Long day plant(LDP)
(C) Day neutral plant(DNP)
(D) Short long day plant(SLDP)
Answer: (A)

3. Vernalization is also called as
(A) Spiringification
(B) Yarovization
(C) Chilling effect
(D) All of these
Answer: (D)

4. The harmone which stimulates the flowering in vernalized plant is
(A) Florigen
(B) Vernalin
(C) Cytokinin
(D) Gibberellin
Answer: (B)

5. Vernalization is
(A) Growth curve related to light
(B) Effect of photoperiods on plant growth
(C) Speeding up ability to flower by low temperature
(D) Diurnal photoperiodicty
Answer: (C)

6. Epigeal germination is found in
(A) Gram
(B) Pea
(C) Castor
(D) Jowar
Answer: (C)

7. Which of the following substance acts as natural germination inhibitor?
(A) Cytokinin
(B) Gibberellin
(C) Ethylene
(D) Caumarin
Answer: (D)

8. The part of seed which emerges out first during germination is
(A) Radicle
(B) Plumule
(C) Root
(D) Shoot
Answer: (A)

9. Indefinite growth of plants is due to presence of
(A) Meristemtic cells
(B) Parenchyma
(C) Permanent tissue
(D) Vascular tissue
Answer: (A)

10. In which of the following, rate of growth gradually slows down and comes to steady stage?
(A) Lag phase
(B) Log phase
(C) Exponential phase
(D) Stationary phase
Answer: (D)

11. Identify the true statement/statements regarding growth and development in organisms.
(A) Growth is intrinsic.
(B) Growth is the physical development while development is the physiological growth.
(C) Growth is accompanied by development.
(D) All of these.
Answer: (D)

12. Vernalization treatment can convert
(A) a biennial into an annual.
(B) a spring variety into a winter variety.
(C) an annual into a perennial.
(D) all of these .
Answer: (D)

13. Scarification is a method of overcoming dormancy in seeds which
(A) contain immature embryo.
(B) Hard seed coat.
(C) possess germination inhibiting substance.
(D) contain fully formed but physiologically unripe embryo.
Answer: (B)

14. Identify the precursor substance used in the biosynthesis of gibberellins in plants.
(A) Gibberellic acid
(B) Methionine
(C) Acetyl Co-A
(D) Tryptophan
Answer: (C)

15. Seeds in which germination is stimulated by light are called
(A) Photoblastic seeds
(B) Thermoblastic seed
(C) Positively photoblastic
(D) Negatively photoblastic
Answer: (C)

16. The chemical substances like phenolics, caumarins, ferulic acid are
(A) Growth harmones
(B) Growth inhibitors
(C) Germination inhibitors
(D) Germination promoters
Answer: (B)

17. The seeds which can not germinate in absence of light is called
(A) Positively photoblastic seed
(B) Negatively photpblastic seed
(C) Photoblastic seed
(D) Photpperiodic seeds
Answer: (A)

18. Germination inhibitors leached out by one plant may inhibit germination of seeds of other plants is called as
(A) Allopathy
(B) Allelopathy
(C) Dormancy
(D) Aromapathy
Answer: (B)

19. The dormancy of seed is due to mechanical resistance of seed coat in
(A) Allisma
(B) Capsella
(C) Amaranthus
(D) All the above
Answer: (D)

20. Which of the following growth harmones in plant is influenced by light?
(A) Gibberellin
(B) Cytokinin
(C) Auxin
(D) Ethylene
Answer: (C)

The lateral meristem in plant is reponsible for Secondary growth

1. The phase of growth which is the first phase and represents lag phase of growth curve is
(A) Formative phase
(B) Cell enlargement phase
(C) Maturation phase
(D) Stationery phase
Answer: (A)

2. The lateral meristem in plant is reponsible for
(A) Primary growth
(B) Secondary growth
(C) Exponential growth
(D) Growht in elongation
Answer: (B)

3. Plant growth can be measured by
(A) Horizontal microscope
(B) Crescograph
(C) Auxanometer
(D) All the above
Answer: (D)

4. The rate of growth is called as
(A) Growing index
(B) Increasing index
(C) Effective index
(D) Efficiency index
Answer: (D)

5. Which of the following shows secondary growth?
(A) Monocots
(B) Dicots
(C) Ferns
(D) Mosses
Answer: (B)

6. Growth can be measured in terms of
(A) Fresh or fry weight increase
(B) Increase in girth of stem
(C) Increase is surface area of leaf
(C) All the above
Answer: (D)

7. Auxins were first isolated form the plants by
(A) Darwin
(B) F.W.Wend
(C) Boysen-Jensen
(D) Sachs
Answer: (B)

8. Apical dominance is due to
(A) Abcisic acid
(B) Gibberelic acid
(C) Auxin
(D) Cytokinin
Answer: (C)

9. Harmone related with cell divisions is
(A) NAA
(B) IAA
(C) Cytokinin
(D) GA3
Answer: (C)

10. Which of the following harmone is mainly concerned with root Initiation?
(A) Kinetin
(B) GA3
(C) IAA
(D) ABA
Answer: (C)

11. Primary precursor of IAA is
(A) Methionine
(B) Adenine
(C) Tryptophan
(D) Alanine
Answer: (C)

12. Avena-Curvature biossay was conducted by
(A) Went
(B) Pal
(C) Darwin
(D) Boysen-Jenson
Answer: (A)

13. Which one of the following grooups comprises synthetic auxin?
(A) 2, 4-D; 2, 4, 5, -T and Zeatin
(B) Gibberellic acid, ABA, IAA
(C) 2, 4-D, 2, 4, 5 – T and NAA
(D) Cytokinin, IAA, IBA
Answer: (C)

14. Which property is specifically attributed to gibberellins?
(A) Apical bud growth inhibition
(B) Root initiation in stem cuttings
(C) Elongation of genetically dwarf plants
(D) Act as selective weedicide
Answer: (C)

15. Cytokinins are the derivatives of
(A) Purine base guanine
(B) Purine base adenine
(C) Pyrimidine base cytosine
(D) Both(A) and(B)
Answer: (B)

16. Richmond-Lang effect is shown by
(A) Auxin
(B) Gibberellin
(C) Cytokinin
(D) Ethylene
Answer: (C)

17. The ripening harmone is
(A) Auxin
(B) Ethylene
(C) GA
(D) ABA
Answer: (B)

18. The photoperiodic stimulus perceived by
(A) Leaves
(B) Buds
(C) Meristem
(D) Flowers
Answer: (A)

19. Garner and Allard are credited for discovery of
(A) Phototropism
(B) Photoperiodism
(C) Phtorespiraton
(D) Photomorphogenesis
Answer: (B)

20. Which of the following can stop flowring in short day plants
(A) Longer but discontinuous dark period
(B) Photopertiod longer than critical duration
(C) Very short period
(D) Any of these
Answer: (D)

Growth is a Irreversible increase in size

1. Growth is a
(A) Irreversible increase in size
(B) Reversible increase in size
(C) Reversible increase in shape
(D) Increase in volume
Answer: (A)

2. The growth of plant differs from growth of animals in being
(A) Diffused
(B) Localised
(C) Localised and diffused
(D) Uniform
Answer: (B)

3. The seed which possess the ability to germinate in suitable favourable condition is called
(A) Quiescent
(B) Viable
(C) Dry
(D) Darmant
Answer: (B)

4. Dormancy of seed is
(A) Phase of active growth
(B) Phase of inactive growth
(C) Phase of stimulated growth
(D) Dead condition
Answer: (B)

5. The condition of viable seed when seeds do not germinate even in presence of favourable environmental condition is called
(A) Dormancy
(B) Secondary Dormancy
(C) Dead seed
(D) None of these
Answer: (A)

6. Quiescence means-
(A) Dormancy due to genetic reasons
(B) Dormancy due to internal conditions
(C) Dormancy due to external unfavourable conditions
(D) Dormancy due to immature embryo
Answer: (C)

7. The growth in dormant organs is
(A) Completely stopped
(B) Continuous
(C) Temporarily arrested
(D) Permanently arrested
Answer: (C)

8. Dormancy in seeds of xanthium is due to
(A) Seed coat imperable to water
(B) Seed coat imperable to gases
(C) Need for after ripening period
(D) Mechanically resistant seed coat
Answer: (B)

9. Dormancy, if occur due to internal factors, it is called
(A) Imposed dormancy
(B) Innate dormancy
(C) Quiescence
(D) Dormancy
Answer: (B)

10. Softening or rupturing of hard seed coat for breaking dormancy is called
(A) Villing
(B) Vernalization
(C) Stratification
(D) Scarification
Answer: (D)

11. The chemical substances like phenolics, caumarins, ferulic acid are
(A) Growth harmones
(B) Growth inhibitors
(C) Germination inhibitors
(D) Germination promoters
Answer: (C)

12. The seeds which can not germinate in absence of light is called
(A) Positively photoblastic seed
(B) Negatively photpblastic seed
(C) Photoblastic seed
(D) Photpperiodic seeds
Answer: (A)

13. Germination inhibitors leached out by one plant may inhibit germination of seeds of other plants is called as
(A) Allopathy
(B) Allelopathy
(C) Competitive absorption
(D) Aromapathy
Answer: (B)

14. Which of the following growth regulator is not used to break dormancy?
(A) Ethylene
(B) Gibberellins
(C) Cytokinins
(D) Abscisic acid
Answer: (D)

15. Keeping seeds in well aerated, moist condition at 1-100C temperature for weeks or months is called
(A) Pre-ripening
(B) Stratification
(C) Scarification
(D) Impaction
Answer: (B)

16. By which method tasta is made permeable to water?
(A) Vernalization
(B) Scarification
(C) Stratification
(D) Impaction
Answer: (B)

17. Which of the following is a growth inhibitor
(A) Auxin
(B) Cytokinin
(C) Gibberilins
(D) ABA
Answer: (D)

18. Threshing, chopping, rupturing seeds by hands or machines is called
(A) Scarification
(B) Chemical scarification
(C) Mechanical scarification
(D) Strafication
Answer: (C)

19. Imposed dormancy can be caused due to
(A) Immature embryo
(B) Hard and resistant seed coats
(C) Non availability of water and O2
(D) Mature embryo
Answer: (C)

20. The type of germination shown by plants of marshy land is
(A) Hypogeal
(B) Epigeal
(C) Viviparous
(D) None of these
Answer: (C)

Friday, March 15, 2013

Cohesive force of water is due to (RPMT, EAMCET)


1.Cohesive force of water is due to (RPMT, EAMCET)
(a) O-bonds
(b) OH-bonds
(c) S-bonds
(d) H-bonds
Answer: (d)

2.Each stoma is surrounded by (Har. PMT)
(a) passage cells
(b) guard cells
(c) parenchyma cells
(d) Lenticels
Answer: (b)

3.Transpiration increases by ________.
(a) high temperature
(b) high humidity
(c) wetness in soil
(d) large nuclei
Answer: (a)

4.Osmosis is intimately connected with ______ membrane.
(a) permeable
(b) semi-permeable
(c) selectively permeably
(d) impermeable
Answer: (b)

5.Maximum transpiration takes place from (RPMT 90)
(a) stem
(b) leaves
(c) roots
(d) flowers and fruits
Answer: (b)

6.Root pressure is maximum when (MPPMT, CPMT, MHT-CET)
(a) transpiration is high and absorption is low
(b) transpiration is very low and absorption is high
(c) transpiration is very high and absorption is high
(d) transpiration and absorption both are slow.
Answer: (b)

7.Epidermal cells containing chloroplasts are
(a) Hydathodes
(b) Accessory cells
(c) Stomata
(d) Guard cells
Answer: (d)

8.In guard cells, when sugar is converted into starch, what takes place to the stomatal pore?
(a) It closes completely.
(b) It opens fully.
(c) It opens partially
(d) It remains unchanged
Answer: (a)

9.Soil water is mainly absorbed by ______.
(a) root cap
(b) root meristem
(c) root hairs
(d) elongation
Answer: (c)

10.Stomatal opening is under the control of (KCET 1988, MANIPUR 2005)
(a) Epidermal cells
(b) Palisade cells
(c) Spongy parenchyma cells
(d) Guard cells
Answer: (d)

11.Dixon and Joly are associated with (CPMT 85)
(a) Light reaction and photosynthesis
(b) Anaerobic respiration
(c) Cohesion theory of ascent of sap
(d) Apical dominance
Answer: (c)

12.Which helps in opening of stomata?
(a) K+
(b) Ca2+
(c) H+
(d) Cl’
Answer: (a)

13.Water enters into root hairs from the soil on account of ________.
(a) turgor pressure
(b) osmotic pressure
(c) suction pressure
(d) root pressure
Answer: (b)

14.In a cell ruptures, on placing in a solution, the solution is said to be _____ with respect to cell sap
(a) hypotonic
(b) isotonic
(c) hypertonic
(d) pure water
Answer: (a)

15.Active K+ exchange mechanism for opening and closing of stomata was given by (RPMT 1985, BHU 1994 & 1997, RPMT 2002)
(a) Darwin
(b) Levitt
(c) Scarth
(d) Khorana
Answer: (b)

16.The most widely accepted theory for ascent of sap in trees is (AMUPMDC, JIPMER, AIMS, BHU, CBSE, EAMCET)
(a) Capillarity
(b) Role of atmospheric pressure
(c) Pulsating action of living cell
(d) Transpiration pull and cohesion theory of Dixon and Joly
Answer: (d)

17.Root pressure helps in ascent of sap by (BIHAR-PMT)
(a) pumping food in phloem
(b) pumping sap into xylem in roots
(c) pumping sap in stem for sending it to roots
(d) all of the above
Answer: (b)

18.In an angiosperm main conduction of water occurs through ________.
(a) tracheids
(b) sieve tubes
(c) vessels
(d) companion cells
Answer: (c)

19.Seeds swell when placed in water due to ________.
(a) Osmosis
(b) Imbibitions
(c) Hydrolysis
(d) Plasmolysis
Answer: (b)

20.Guard cells differ from epidermal cells in having (DPMT 1984, CPMT 1993)
(a) Mitochondria
(b) Vacuoles
(c) Cell Wall
(d) Chloroplasts
Answer: (d)

Root pressure is due to (HAR-PMT, MP-PMT)


1.Root pressure is due to (HAR-PMT, MP-PMT)
(a) active absorption
(b) passive absorption
(c) increased transpiration
(d) increased photosynthesis
Answer: (d)

2.Root pressure theory was proposed by ________.
(a) Priestley
(b) Stocking
(c) Boehm
(d) Dixon
Answer: (a)

3.The maximum absorption of water by roots occurs in the (region) zone of (M.P. PMT 2001)
(a) root cap
(b) cell division
(c) cell elongation
(d) root hairs
Answer: (d)

4.Of the processes which occur in leaves, the one which may lower their temperature (cooling effect) is (DPMT 86)
(a) respiration
(b) Photosynthesis
(c) Transpiration
(d) hydrolysis
Answer: (c)

5.Water is absorbed from outside solution only when it is (AFMC)
(a) saturated
(b) isotonic
(c) hypertonic
(d) hypotonic
Answer: (d)

6.Stomata of a plant open due to (CBSE)
(a) influx of potassium ions
(b) Efflux of potassium ions
(c) Influx of hydrogen ions
(d) Influx of calcium ions
Answer: (a)

7.Stomata close in response to
(a) hot dry weather
(b) abscisic acid
(c) cytokinin
(d) both (a) and (b)
Answer: (d)

8.Cohesion-tension theory is related to ________.
(a) respiration
(b) ascent of sap
(c) transpiration
(d) photosynthesis
Answer: (b)

9.The maximum loss of water in transpiration is from (Hariyana PMT 2005)
(a) Lenticels
(b) Cuticle
(c) Stomata
(d) Hydothodes
Answer: (c)

10.The following percentage of water absorbed by herbaceous plants is lost in transpiration (JIPMER 2002, MPPMT, CPMT)
(a) 80
(b) 60
(c) 99
(d) 40
Answer: (c)

11.Stomata open when the guard cells posses (CPMT)
(a) less K+
(b) more ABA
(c) More K+
(d) All of the above
Answer: (c)

12.Water lost through transpiration is
(a) pure water
(b) rich in organic solutes
(c) rich in dissolved salts
(d) all the above
Answer: (a)

13.The water available for plants in soil is ________.
(a) gravitational water
(b) hygroscopic water
(c) capillary water
(d) chemically bound water
Answer: (c)

14.About ______ percent of water absorbed by plants is lost by transpiration.
(a) 55
(b) 97
(c) 85
(d) 75
Answer: (b)

15.The conditions under which transpiration would be most rapid? (CPMT 81, AMU 87, BHU 77, DPMT 84)
(a) High humidity
(b) Excess of water in soil
(c) Low humidity, high temperature, guard cell are turgid (open) moist soil
(d) Low velocity of wind
Answer: (c)

16.Transpiration is helpful to plants in (AFMC, CPMT)
(a) Cooling
(b) loss of excess nutrients
(c) upward conduction/ascent of sap
(d) loss of excess water
Answer: (c)

17.Chlorophyllous cells fewer in number, unique in shape with inner walls thicker are (EAMCET)
(a) guard cells
(b) passage cells
(c) subsidiary cells
(d) bulliform cells
Answer: (a)

18.Water in plants is transported by which of the followings?
(a) Cambium
(b) phloem
(c) epidermis
(d) xylem
Answer: (d)

19.The most widely accepted theory of water translocation in plants is ______.
(a) Root pressure theory
(b) Capillary theory
(c) Cohesion theory
(d) Water pump theory
Answer: (c)

20.Which is produced during water stress that brings stomatal closure? (JIPMER, RPMT [2000], CBSE, AMU, MP-PMT, BHU)
(a) Ethylene
(b) Abscisic acid
(c) Ferulic acid
(d) Coumarin
Answer: (B)

Rate of transpiration is highest when (JKCMEE)


1.Which one gives the most valid explanation for guard cell movements? (CHD. CET 2002, MPPMT 91)
(a) Guard cell photosynthesis
(b) Starch hydrolysis theory
(c) Potassium influx and efflux
(d) Transpiration
Answer: (c)

2.Rate of transpiration is highest when (JKCMEE)
(a) soil is wet and air is dry
(b) soil is wet and air is humid
(c) soil is dry and air is humid
(d) both soil and air are dry
Answer: (a)

3.Which wall of the guard cells is thick? (CPMT 86, MPPMT 88)
(a) Lateral
(b) Inner
(c) Outer
(d) All of the above
Answer: (b)

4.Who said that ‘transpiration is a necessary evil”? (MP-PMT)
(a) Bose
(b) Steward
(c) Anderson
(d) Curtis
Answer: (d)

5.In order to demonstrate root pressure, the plant is given a cut (Har. PMT)
(a) at the tip
(b) transition zone
(c) a few centimeters above the soil
(d) a few centimeters below the soil
Answer: (c)

6.Cell membrane is ________.
(a) permeable
(b) impermeable
(c) semipermeable
(d) selectively permeable
Answer: (c)

7.Transpiration occurs from (CPMT 1980 & 1988, JIPMER 1988)
(a) leaves
(b) stem
(c) all aerial parts
(d) roots
Answer: (c)

8.Transpiration differs from evaporation in (CPMT 85)
(a) rate of water loss
(b) transpiration is a physiological process while evaporation is a physical process
(c) transpiration is a physical process while evaporation is a physiological process
(d) frequency of water loss
Answer: (b)

9.Cohesion theory of ascent of sap was proposed by (HP-PMT, BIHAR-PMT, R-PMT, AFMC))
(a) Munch
(b) Stephen Hales
(c) Dixon and Joly
(d) Bose
Answer: (c)

10.Which of the following explain ascent of sap?
(a) Cohesion theory
(b) Mass flow
(c) Diffusion
(d) Guttation
Answer: (a)

11.A semipermeable membrane allows the diffusion of (CPMT 1991)
(a) solutes
(b) Solvent
(c) Both solvent and solutes
(d) none of the above
Answer: (b)

12.Transpiration rate is dependent upon (CPMT 85)
(a) Stomatal frequency
(b) Position of stomata
(c) State of stomata
(d) All the above
Answer: (d)

13.In seed germination, the first to occur is (K-CET, BIH-MMT)
(a) Diffusion
(b) Exosmosis
(c) Endosmosis
(d) Imbibition
Answer: (d)

14.Transpiration is not helpful in ________.
(a) cooling
(b) Loss of nutrient
(c) Loss of water
(d) Ascent of sap
Answer: (b)

15.Root hairs absorb water from soil when (AFMC 1988, JIPMER 1986, CPMT 1984)
(a) osmotic concentration is same in the two
(b) solute concentration is higher in soil solution
(c) solute concentration is higher in root hairs
(d) absorption is active
Answer: (C)

16.Transpiration is regulated by movements of (JIPMER 2004, CPMT)
(a) guard cells
(b) subsidiary cells
(c) epidermal cells
(d) mesophyll cells
Answer: (a)

17.Exudation of xylem sap on cutting of a shoot is due to (R-PMT)
(a) guttation
(b) root pressure
(c) transpiration
(d) none of the above
Answer: (a)

18.Rate of transpiration increases ________.
(a) when there is no light
(b) in water
(c) when temperature is high
(d) in rainy season
Answer: (c)

19.Raisins placed in water swell up due to (CPMT 1988)
(a) plasmolysis
(b) adsorption
(c) diffusion
(d) endosmosis
Answer: (d)

20.Transpiration is least in (KCET 2006, BHU DPMT, CBSE)
(a) Good soil moisture
(b) High wind velocity
(c) Dry environment
(d) High atmospheric humidity
Answer: (d)

In guard cells, during day, there is


1. Stomata opens because the guard cells have-
(A) Outer thin walls
(B) Chloroplast
(C) Inner thick walls
(D) Kidney shape
Answer: (D)

2. Transpiration through small openings present in bark of woody stem surrounded by complementary cells is
(A) Stomatal transpiration
(B) Cuticular transpiration
(C) Lenticular transpiration
(D) Foliar transpiration
Answer: (C)

3. The total losss of water taking place in a plant due to lenticular transpiration is
(A) 1%
(B) 10%
(C) 0.1%
(D) 0.01%
Answer: (C)

4. The special modified epidermal cells surrounding stomatal pore are called
(A) Epithelial cells
(B) Guard cells
(C) Subsiduary cells
(D) Accessory cells
Answer: (B)

5. The kidney shaped guard cells are present in
(A) Dicot plants
(B) Monocot plants
(C) In both
(D) In algae
Answer: (A)

6. Dumbell shaped guard cells are present in
(A) Ground nut
(B) Gram
(C) Wheat
(D) Mango
Answer: (C)

7. The cells which are closely associated and intercating with guard cells are
(A) Transfussion tissue
(B) Complementary cells
(C) Subsidiary cells
(D) Hypodermal cells
Answer: (C)

8. Conversion of starch to sugar is essential for
(A) Stomatal opening
(B) Stomatal closing
(C) Stoma formation
(D) Stomatal growth
Answer: (A)

9. Stomatal opening is based on
(A) Exosmosis
(B) Endosmosis
(C) Plasmolysis in guard cells
(D) Decrease in concentration of cell sap
Answer: (B)

10. Transpiration through leaves in called as
(A) Cauline transpiration
(B) Foliar transpiration
(C) Cuticular transpiration
(D) Lenticular transpiration
Answer: (B)

11. When the protoplasm just starts retreating from the cell wall it is known as
(A) Plasmolysis  
(B)  incepient plasmolysis
(C) Delplasmolysis
(D) Replasmolysis
Answer: (B)

12. In guard cells, during day, there is
(A)  efflux of H+.
(B)   infflux of K+.
(C)  uptake of Cl­-
(D)   all of these
Answer: (D)

13. Maximum root pressure develops, when
(A) Transpiration is low and absorption is high
(B) Transpiration is low and absorption is low
(C) When transpiration and absorption are low
(D) Transpiration and absorption are high
Answer: (A)

14. ______ is precursor for abscissic acid (ABA)
(A) water potential of soil solution is more than root hair cell sap.
(B) Water potential of soil solution is less than root hair cell sap
(C) Water potential both outside and inside hair is equal
(D) Water potential value of soil solution is negative.
Answer: (A)

15. Cohesive and adhesive force cause
(A) Absorption of water
(B) Continuity of water column
(C) Discontinuity of water column
(D) Plasmolysis
Answer: (B)

16. DPD of flacid cell and turgid cell is ______and _____ respectively.
(A) Maximum and Minimum
(B) Minimum and Maximum
(C) Zero and zero
(D) Zero and Maximum
Answer: (A)

17. Which of the folowing is due to hydrostatic pressure
(A) Osmosis
(B) Plasmolysis
(C) Exeudation
(D) Transpiration
Answer: (C)

18. The magnitude of root pressure will be minimum in
(A) Rainy season
(B) Fast transpiring angiosperms
(C) Wilting plant
(D) During ascent of sap
Answer: (A)

19. Which of the following theory cannot explain the ascent of sap in tall trees.
(A) Root pressure and Transpiration pull
(B) Root pressure and capillarity
(C) Capillarity and Transpiration
(D) Capillarity and physical force theory
Answer: (B)

20. Transplanted plant sometimes do not survive as
(A) They do not get required minerals
(B) Their leaves get damaged in the process
(C) Their root hairs are lost during transplanatation
(D) They fails to adopt new soil
Answer: (C)

In a plant cell, O.P. is equal to


1. The hydrostatic pressure which is developed due to accumulation of water absorbed by roots is called
(A) Turgor pressure
(B) Wall pressure
(C) Root pressure
(D) Diffusion pressure
Answer: (C)

2. Root pressure is absent in
(A) Herbaceous plants
(B) Gymnosperms
(C) Dicot plant
(D) Trees
Answer: (B)

3. Root pressure is measured by
(A) Barometer
(B) Atmometer
(C) Manometer
(D) Auxanometer
Answer: (C)

4. Maximum root pressure is observed when
(A) Transpiration and absorption are very low
(B) Transpiration and absorption are very high
(C) Transpiration is high and absorption is low
(D) Transpiration is low an dabsorption is high
Answer: (D)

5. The existence of root pressure can be demonstrated by
(A) Exudation or bleeding
(B) Wilting
(C) Transpiration
(D) Bleeding
Answer: (A)

6. The most widely accepted theory for ascent of sap is
(A) Root pressure theory
(B) Pulsatory theory
(C) Capillarity theory
(D) Cohesion theory
Answer: (D)

7. The rate of absorption of water _____ with increase in salt concentration in the soil
(A) Remains unchanged
(B) Increases
(C) Decreases
(D) No effect
Answer: (C)

8. Which of the following physical forces are supposed to be responsible for ascent as sap?
(A) Imbibition
(B) Capillary force
(C) Transpiration pull and cohesion
(D) Root pressure
Answer: (C)

9. The ascent of sap takes place in
(A) Xylem parenchyma
(B) Walls of tracheary elements
(C) Tracheids with associated xylem parenchyma
(D) Lumen of tracheary elements
Answer: (D)

10. Upward movement of water in plants is
(A) Transpiration
(B) Ascent of sap
(C) Exudation
(D) Sucking
Answer: (B)

11. Lignin and cellulose present in xylem vessels shows affinity for water due to
(A) Adhesive forces
(B) Cohesive forces
(C) Water potential d. Wall pressure
Answer: (A)

12. Turgidity of the cell is necessary for
(A) Causes cell elongation
(B) Causes opening and closing of stomata
(C) Prevents wilting of leaves
(D) All the above
Answer: (D)

13. In a plant cell, O.P. is equal to
(A) D.P.D. - T.P.
(B) D.P.D. + T.P.
(C) T.P. - D.P.D
(D) T.P. - D.P.
Answer: (A)

14. Cohesion – transpiration pull theory operates only in
(A) Active water absorption
(B) Passive water absorption
(C) Conditions opposing transpiration
(D) Conditions favouring transpiration
Answer: (B)

15. With rise in turgidity, wall pressure will
(A) Increase
(B) Decrease
(C) Remain constant
(D) Fluctuating
Answer: (A)

16. Pickes, jam, jellys has low risk of spoilage as they causes
(A) Cuttation
(B) Diffusion
(C) Plasmolysis
(D) Imbibition
Answer: (C)

17. Absorption of water from cut ends of stems disapproves the theory of
(A) Capillarity
(B) Cohesion-tension theory
(C) Root pressure theory
(D) Imbibitional pressure theory
Answer: (C)

18. The loss of water in the form of water droplets is called
(A) Transpiration
(B) Guttation
(C) Evaporation
(D) Bleeding          
Answer: (B)

19. Transpiration occurs through
(A) Stem
(B) Roots
(C) Leaves
(D) All aerial parts of plant
Answer: (D)

20. Stomata open and close due to
(A) Tugor pressure of guard cells
(B) Root pressure
(C) Positive pressure
(D) Imbibitional pressure
Answer: (A)

Water diffusion into endodermis takes place through


1. The part of Root involved in water absorption is
(A) Zone of cell division
(B) Zone of root hairs
(C) Zone of elongation
(D) Zone of root cap
Answer: (B)

2. In plants, water rises upwards through
(A) Cambium
(B) Stomata
(C) Xylem
(D) Pholem
Answer: (C)

3. When water enters the cell, one of the pressures is exerted on cell wall
(A) Osmotic pressure
(B) Sunaction pressure
(C) Turgor pressure
(D) Root pressure
Answer: (C)

4. Diffusion of water through semipermeable membrane from dilute solution to concentrated solution is
(A) Imbibition
(B) Osmosis
(C) Plasmolysis
(D) Necrosis
Answer: (B)

5. Osmosis is the diffusion of
(A) Water
(B) Solute particles
(C) Gases    
(D) Energy
Answer: (A)

6. The membrane which allows the movement of only water molecules to pass through it and not the solute particles
(A) Permeable membrane
(B) Semipermeable membrane
(C) Imperimeable membrane
(D) Not permeable
Answer: (B)

7. The membrane which allows passage of solvent as well as some selective solutes and prevents others is called
(A) Permeable membrane
(B) Semipermeable membrane
(C) Selectively permeable membrane
(D) Imperimeable membrane
Answer: (C)

8. Cell wall of root hair has two layers outer and inner which are made up of
(A) Pectin and lignin respectively
(B) Pectin and cellulose respectively
(C) Cellulose and pectin respectively
(D) Lignin and cellulose respectively
Answer: (B)

9. The outer solution having equal concentration as that of the cell sap is called
(A) Hypotonic solution
(B) Isotonic solution
(C) Hypertonic solution
(D) Neutral solution
Answer: (B)

10. The process of imbibition involves
(A) Diffusion
(B) Capillary action
(C) Absorption
(D) Both (A) and (B)
Answer: (D)

11. A cell increase in volume when it is placed in
(A) Hypertonic solution
(B) Hypotonic solution
(C) Isotonic solution
(D) None of these
Answer: (B)

12. Which of the following will be zero in a fully turgid cell?
(A) Wall pressure
(B) Suction pressure (DPD)
(C) Turgor pressure
(D) Imbibitional pressure
Answer: (B)

13. Endosmosis occurs when the plant cell is placed in
(A) Strong solution
(B) Isotonic solution
(C) Hypotonic solution
(D) Hypertonic solution
Answer: (C)

14. Cell becomes turgid because of
(A) Plasmolysis
(B) Exosmosis
(C) Endosmosis
(D) Diffusion
Answer: (C)

15. Pressure developed on cell wall of plant cell caused by osmotic movement of water is called as
(A) Turgor pressure
(B) Osmotic pressure
(C) Suction pressure
(D) DPD
Answer: (A)

16. The rapid type of water absorption is
(A) Active absorption
(B) Passive absorption
(C) Active osmotic absorption
(D) Active non-osmotic absorption
Answer: (B)

17. The pathway in which water moves through cell wall without crossing any membrane
(A) Apoplast pathway
(B) Symplast pathway
(C) Vaculoar pathway
(D) Transmembrane pathway
Answer: (A)

18. Symplastic movement of water takes place through
(A) The cell wall
(B) The plasmodesmata
(C) The casparian strips
(D) Through endodermis
Answer: (B)

19. Water diffusion into endodermis takes place through
(A) Lignified cells
(B) Casparian strips
(C) Passage cells
(D) Suberzed cells
Answer: (C)

20. Root pressure is due to
(A) Active absorption
(B) Passive absorption
(C) Increased turgidity
(D) Increased transpiration
Answer: (A)

Which of the following is necessary for seed formation in angiosperm?


1. The fully formed male gametophyte of angiosperms contains
(A) one generative cell, one tube cell and one body cell.
(B) one generative cell, one tube cell and one stalk cell.
(C) one tube nucleus, one vegetative cell and one generative cell.
(D) one vegetative nucleus, and two male gametes.
Ans: (d)

2. Which of the following involves comparatively greater wastage of pollen?
(A) Chiropterophily.
(B) Anemophily.
(C) Entomophily.
(D) Ornithophily.
Ans: (B)

3. If the endosperm cells of an angiosperm seed sre pentaploid, then such a seed may have been formed by which of the following parents?
(A) Triploid female and diploid male.
(B) Diploid male and tetraploid female.
(C) Both parents tetraploid.
(D) Triploid male and diploid female.
Ans: (b)

4. The nucellus in the ovule is often called
(A) megagametophyte.
(B) megasporangium.
(C) megasporophyte.
(D) female sporogenous tissue.
Ans: (B)

5. Asexual reproduction differs from sexual reproduction as
(A) it does not involve genetic recombination
(B) it does not involve meiosis and gametic unio
(C) it produces clone
(D) all of these
Ans: (D)

6. The continued existence of any race can be basically attributed to the
(A) reprodution
(B) domestication
(C) conservation
(D) None of these
Ans: (a)

7. Which of the following is not concerning pollination?
(A) Syngamy
(B) Autogamy
(C) Allogamy
(D) Geitonogamy
Ans (a)

8. In angiosperms, meiosis occurs at the time of
(A) formation of gametes
(B) Change over generation from sporophyte to gametophyte
(C) formation of ovules
(D) formation of anthers
Ans: (b)

9. The point of attachment of the cotyledons on the tigellum is
(A) above the hypocotyl
(B) below the epicotyl
(C) called first node
(D) as stated in each of these
Ans: (d)

10. After fertilization synergids and antipodal cells form____.
(A) Oospore
(B) Endosperm
(C) Embryo
(D) Degenerates
Ans (d)

11. The process of fusion of male gamete with the polar nuclei is known as _____.
(A) Fertilization
(B) Triple fusion
(C) Syngamy
(D) None
Ans: (b)

12. Palynology deals with study of
(A) DNA
(B) Chromosomes
(C) Pollen grains
(D) Flowers
Ans: (c)

13. How many pollen mother cells should undergo meiotic division to produce 64 pollen grains?
(A) 64
(B) 32
(C) 16
(D) 8
Ans (c)

14. In a fully developed male gametophyte the number of nuclei is
(A) One
(B) Two
(C) Three
(D) Four
Ans (c)

15. The mature anther wall comprises an epidermis followed by a layer of radially elongated cells with fibrous bands of callose called endothelium whose function is
(A) Nutrition
(B) Protection
(C) Mechanical
(D) Dehiscence
Ans (d)

16. If an endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in each cell of the root will be
(A) 8
(B) 4
(C) 16
(D) 24
Ans (c)

17. Which of the following is necessary for seed formation in angiosperm?
(A) Ovule
(B) Pollination
(C) Double fertilization
(D) All the above
Ans (d)

18. Anthesis is
(A) Elongation of pollen tube is style
(B) Emergence of anthers from corolla tube
(C) Dehiscence of anthers
(D) The first opening of a flower
Ans (c)

19. Commonly in a mature fertilized ovule n, 2n and 3n condition is respectively found in
(A) Antipodals, synergids and integuments
(B) Egg, nucellus and endosperm
(C) Antipodals, zygote and endosperm
(D) Endosperm, nucellus and egg
Ans (c)

20. Karyogamy is
(A) Fusion of zoospores
(B) Fusion of cytoplasm
(C) Fusion of spores
(D) Fusion of gametic nuclei
Ans: (d)


In which of following, diameter of stock is larger than scion


1. Agamospermy produces new plant through the formation of
(A) gamete
(B) Bulbil
(C) Bud
(D) Asexual embryo
Answer: (D)

2. Agamospermy includes
(A) Non recurrent apomixis
(B) Recurrent apomixis
(C) Adventive polyembryony
(D) All the above
Answer: (D)

3. Asexual reproduction includes
(A) Amphimixis
(B) Vegetative reproduction
(C) Agamospermy
(D) Both (B) and (C)
Answer: (D)

4. Plants identical to mother plant can be obtained through
(A) Stem cutting
(B) Seed
(C) Leaf cutting
(D) Both A and C
Answer: (D)

5. Population of genetically similar plants obtained from same invidual by vegatative method
(A) Propagule
(B) Bud
(C) Clone
(D) Callus
Answer: (C)

6. Ramet is
(A) Population of genetically similar plant
(B) Individual of clone
(C) Callus
(D) Clone
Answer: (B)

7. Which root will form a new plant?
(A) Azadiracita
(B) Dahila
(C) Ipomea
(D) Both (B) and (C)
Answer: (D)

8. The sub-aerial modification of stem for vegetative reproduction is
(A) Tuber
(B) Rhizome
(C) Bulb
(D) Runner
Answer: (D)

9. Buds develops in Bryophyllum daigremonthianum
(A) From marginal notches when leaf falls on ground
(B) From marginal notches while attached to plant
(C) From marginal notches of leaves
(D) From the place of injury
Answer: (B)

10. Which of the following is root promoting harmone?
(A) Ethylene
(B) Auxins
(C) Abscisic acid
(D) None of these
Answer: (B)

11. Stem cuttings are treated wih IAA or NAA to promote
(A) Development of buds
(B) Formation of root
(C) Formation of shoot
(D) Both (B) and (C)
Answer: (B)

12. The technique of joining together parts of two plants to form one composite plant is
(A) Budding
(B) Cutting
(C) Crafting
(D) Sowing
Answer: (C)

13. Grafting can be used only in plants having
(A) Soft system
(B) Hard tissue
(C) Buds
(D) Cambium
Answer: (D)

14. In grafting scion forms
(A) Root system
(B) Shoot system
(C) Hybrid plant
(D) New plant
Answer: (B)

15. Scion is
(A) Graft of shoot
(B) Graft of root
(C) A bud
(D) Clone
Answer: (A)

16. In which of following, diameter of stock is larger than scion
(A) Side grafting
(B) Tongue grafting
(C) Wedge grafting
(D) Crown grafting
Answer: (D)

17. More than one scion are grafted on single stock, the grafting is
(A) Crown grafting
(B) Wedge grafting
(C) Layering
(D) Bud grafting
Answer: (A)

18. Special type of grafting, in which scion unite with the stock while still attached to parent plant
(A) Approach grafting
(B) Wedge grafting
(C) Side grafting
(D) Tongue grafting
Answer: (A)

19. Grafting technique is successful between two plants having
(A) Viable seed
(B) Parenchymatous tissue
(C) Active buds
(D) Active vascular cambium
Answer: (D)

20. Sweet potato and potato are similar to each other in having
(A) Nature of stem
(B) Storage food
(C) Origin of root
(D) Modified part
Answer: (B)

21. Microsporangial initial of an anther is
(A) Archesporium
(B) Endosporium
(C) Tapetal cell
(D) Epifermis
Answer: (A)

22. Microsporogenesis occurs
(A) In ovary
(B) In ovule
(C) In anther
(D) In pollen grain
Answer: (C)

23. Pollen grain representes
(A) Male gametophyte
(B) Partly developed male gametophyte
(C) Female gametophyte
(D) Male gamete
Answer: (B)

24. Innermost layer of anther is tapetum, whose function
(A) Protection
(B) Nutrition
(C) Mechanical support
(D) Help in dehiscence
Answer: (B)

25. Typical anther is
(A) Monosporangiate
(B) Bisporangiate
(C) Trisporangiate
(D) Tetrasporangiate
Answer: (D)

Suspensor is a component of


1.Tapetum is present between
(A) Epidermis and endothecium
(B) Endothecium and middle layers
(C) Epidermis and middle layers
(D) Middle layers and sporoangenous tissue
Answer: (D)

2.Monocot pollengrains are generally
(A) Monocoplate
(B) Bicolpate
(C) Tricolpate
(D) Multicolpate
Answer: (A)

3.Exine of pollen-grain is made up of
(A) Sporopollenin
(B) Cellulo-pectin
(C) Callose
(D) Cellulose
Answer: (A)

4.Ovule is
(A) Megasporangium
(B) Microsporangium
(C) Integumented megasporangium
(D) Megaspore
Answer: (C)

5.The tenuinucellate ovule has
(A) Small amount of nucellus
(B) Large amount of nucellus
(C) Chalazal nucellus
(D) MIcropyle nucllus
Answer: (A)

6.The point at which funicle is attached to body of ovule
(A) Raphe
(B) Hilum
(C) Endothelium
(D) Chalaza
Answer: (B)

7.A typical angiospermic embryo sac is susally
(A) One celled
(B) Two celled
(C) Three celled
(D) Seven celled
Answer: (D)

8.Continued self poll ination results in
(A) Better progeny
(B) Weak progeny
(C) New varieties
(D) Both (A) and (C)
Answer: (B)

9.Cleistogamous flowers are always
(A) Insect pollinated
(B) Wind pollinated
(C) Cross pollinated
(D)    Self pollinated
Answer: (D)

10.In angiosperms pollination is always
(A) Direct
(B) Indirect
(C) Both A and B
(D) None of these
Answer: (B)

11.Entomopjilous flowers are with
(A) Dry and smooth pollen
(B) Sticky and rough pollen
(C) Less numbers of pollens
(D) Brightly coloured pollens
Answer: (B)

12.Flowers are small and unattractive in
(A) Entomophily
(B) Ornithophily
(C) Anemophily
(D) All of these
Answer: (C)

13.When birds are agents, the pollination is
(A) Anemophily
(B) Entomophily
(C) Ornithophily
(D) Hydrophily
Answer: (C)

14.Syngamy refers to
(A) Fusion of one of the sperm with synergid
(B) Fusion of one male gamete with female gamete
(C) Fusion of male gamete with secondary nucleus
(D) Fusion of one male gamete with egg and other male gamete with secondary nucleus
Answer: (B)

15.Endosperm is generally
(A) Haploid
(B) Diploid
(C) Triploid
(D) Polyploid
Answer: (C)

16.Free nuclear divisions occurs in
(A) Cellular endosperm
(B) Nuclear endosperm
(C) Helobial endosperm
(D) Both (B) and (C)
Answer: (D)

17.Suspensor formed during development of dicot embryo is
(A) 2-3 celled
(B) 3-4 celled
(C) 5-6 celled
(D) 6-10 celled
Answer: (D)

18.The first cell of suspensor towards micropyle which absorbs food material is
(A) Hypophysis
(B) Haustoria
(C) Radicle
(D) Transverse cell
Answer: (B)

19.Helobial type of endosperm is seen in
(A) Asphodelus
(B) Common in order Helobiales
(C) Petunia
(D) Both (A) and (B)
Answer: (D)

20.In monocot seeds, radicle is covered by a protective covering called
(A) Coleoptile
(B) Coleorrhiza
(C) Scutellum
(D) Aleurone layer
Answer: (B)

21.Embryo axis is also called as
(A) Tegman
(B) Tiller
(C) Tigellum
(D) Scutellum
Answer: (C)

22.The first node indicates point of attachment of  ----- to embryo axis
(A) Plumule
(B) Radicle
(C) Cotyledons
(D) All of the above
Answer: (C)

23.______ during embryo development push he embryo deeper into the endosperm
(A) Octan
(B) Suspensor
(C) Tegellum
(D) Scutellum
Answer: (B)

24.Suspensor is a component of
(A) Germinating seed
(B) Developing embryo
(C) Mature embryo
(D) Endosperm
Answer: (B)

25.The type of seed in which endosperm is completely utilized by developing embryo
(A) Endospermic seed
(B) Non endospermic sees
(C) Albuminous seed
(D) None of these
Answer: (B)

Gonads can be classified as


1.Gonads can be classified as
(a) endocrine glands
(b) exocrine glands
(c) gametes
(d) none of the above
Answer: (d)

2.Gonads are formed from
(a) Ectoderm
(b) Endoderm
(c) Mesoderm
(d) Ectomesoderm
Answer: (c)

3.Gestation period in human is
(a) 10 weaks
(b) 28 weaks
(c) 32 weaks
(d) 38 weaks
Answer: (d)

4.Germinal epithelium o fovary has
(a) Cuboidal cells
(b) Columnar cells
(c) Squamous cells
(d) Stratified cells
Answer: (a)

5.FSH is secreted by
(a) Thyroid
(b) Adrenal
(c) Anterior pituitary
(d) Posterior pituitary
Answer: (c)

6.First to be formed during embryonic development is
(a) Primitive streak
(b) Mesoderm
(c) Ectoderm
(d) Endoderm
Answer: (d)

7.First or fore milk is called
(a) Colostrum
(b) Baby’s milk
(c) Rostrum
(d) Cholesterol
Answer: (a)

8.Fertilizins are emitted by
(a) Immature eggs
(b) Mature eggs
(c) Sperms
(d) Polar bodies
Answer: (b)

9.Fertilization of ovum occurs in
(a) Fimbriac of oviduct
(b) Isthmus of oviduct
(c) Ampulla of oviduct
(d) None of the above
Answer: (c)

10.Fertilization is
(a) Union of diploid spermatozoon with diploid ovum to form diploid zygote
(b) Union of haploid sperm with haploid ovum to form haploid zygote
(c) Union of haploid sperm with haploid ovum to form diploid zygote
(d) Union of diploid sperm with haploid ovum to form triploid zygote
Answer: (c)

11.Eye develops from
(a) Ectoderm
(b) Endoderm
(c) Mesoderm
(d) Both ectoderm and mesoderm
Answer: (d)

12.Extra structure that provides nutrition to the embryo is
(a) Umbilicus
(b) Amnion
(c) Chorion
(d) Placenta
Answer: (d)

13.Estrus cycle is found in
(a) Primates only
(b) Anthropoids only
(c) All mammals except apes and man
(d) none of the above
Answer: (c)

14.Estrogen level is maximum in which part of ovarian cycle
(a) Secretory phase
(b) Ovulatory phase
(c) Proliferative phase
(d) Menstrual phase
Answer: (c)

15.Endometrium is part of
(a) Urinary bladder
(b) Uterus
(c) Ureter
(d) Urethra
Answer: (b)

16.During gastrulation size of embryo remains constant but metabolic rate
(a) increases
(b) decreases
(c) is unchanged
(d) none of the above
Answer: (a)

17.During cleavage, what is true about cells?
(a) Nucleocytoplasmic ratio remains unchanged
(b) Size does not increase
(c) There is less consumption of oxygen
(d) The division is like meiosis
Answer: (b)

18.During cleavage
(a) size of resulting cells decreases
(b) Size of resulting cells increases
(c) Size of early embryo increases
(d) Size of early embryo decreases
Answer: (a)

19.Diameter of human ovum is about
(a) 0.10 mm
(b) 0.13 mm
(c) 0.15 mm
(d) 0.17 mm
Answer: (b)

20.Cytoplasm surrounding mitochondria present in the middle piece of sperm is known as
(a) Manchette
(b) Microplasm
(c) Centroplasm
(d) Acrosome
Answer: (b)

Merobalstic cleavage is Incomplete


1.Merobalstic cleavage is
(a) Total
(b) Spiral
(c) Incomplete
(d) Horizontal
Answer: (c)

2.Menstrual phase is followed by
(a) Luteal phase
(b) Follicular phase
(c) Fertilization
(d) Implantation
Answer: (b)

3.Membrana granulose is
(a) a layer of columnar cells around ova
(b) corona radiata
(c) a part of zona pellucida
(d) multilayer of follicular cells around ova
Answer: (a)

4.Maturation of sperms occurs in
(a) Vasa deferentia
(b) Epididymes
(c) Rete testis
(d) Vasa efferentia
Answer: (b)

5.Mammary glands are modification of
(a) Sebaceous glands
(b) Sweat glands
(c) Meibomian glands
(d) None of the above
Answer: (a)

6.Location and secretion of Leydig cells are
(a) Liver - cholesterol
(b) Ovary - estrogen
(c) Testis - testosterone
(d) Pancreas - glucagon
Answer: (c)

7.Location and secretion of Leydig cells are
(a) Liver - Cholesterol
(b) Testis - Testosterone
(c) Ovary - Oestrogen
(d) Pancrease - Glucagon
Answer: (b)

8.Life expectancy of sperms in the female tract is
(a) 48 hrs
(b) 12 hrs
(c) 60 hrs
(d) 36 hrs
Answer: (a)

9.Levels of estrogen and progesterone are minimum at the time of
(a) on set of menstrual phase
(b) secretory phase
(c) ovulation
(d) follicular phase
Answer: (a)

10.Inability of sperm to fertilize ovum is termed as
(a) impotence
(b) sterility
(c) prostatomegaly
(d) none of the above
Answer: (b)

11.In the testis, primary germinal cells undergo mitotic divisions to produce
(a) spermatozoa
(b) primary spermatocyte
(c) spermatogonia
(d) secondary spermatocyte
Answer: (c)

12.In the absence of acrosome, the sperm
(a) cannot penetrate the egg
(b) cannot get food
(c) cannot get energy
(d) cannot swim
Answer: (a)

13.In telolecithal egg
(a) yolk is present in the centre
(b) yolk is unevenly distributed
(c) yolk is absent
(d) yolk is present all over the ovum
Answer: (b)

14.In Mammals the tests occur in scrotal sacs outside the viscera because of the
(a) Presence of urinary bladder
(b) Presence of rectum
(c) Long vas deferens
(d) Requirement of low temperature for spermatogenesis
Answer: (d)

15.In humans, spermatogenesis takes about
(a) 74 days
(b) 30 days
(c) 100 days
(d) 24 days
Answer: (a)

16.In humans, blastula is known as
(a) Trophoderm
(b) Blastocyst
(c) Foetal blastula
(d) Oolemma
Answer: (b)

17.In humans at the end of first meiotic dividion, the male germ cells differentiate into
(a) Spermatids
(b) Spermatogonia
(c) Primary spermatocytes
(d) Secondary spermatocytes
Answer: (d)

18.In human penis, urethra passes through
(a) Corpus cavernosum
(b) Corpus luteum
(c) Corpus spongiosum
(d) Corpus albicans
Answer: (c)

19.In human male, the unpaired structure is
(a) Testes
(b) Seminal vesicles
(c) Bulbourethal glands
(d) Prostate
Answer: (d)

20.In human beings the type of cleavage is
(a) Holoblastic and complete
(b) Meroblastic and incomplete
(c) Holoblastic and incomplete
(d) Meroblastic and complete
Answer: (a)

Peak of LH tire occurs during


1.Phase of menstrual cycle when ovulation occurs is
(a) Luteal
(b) Menstrual
(c) Proliferative
(d) Secretory
Answer: (c)

2.Peak of LH tire occurs during
(a) Ovulatory phase
(b) Menstrual phase
(c) Follicular phase
(d) Secretory phase
Answer: (a)

3.Part of sperm involved in penetrating egg membrane is
(a) Tail
(b) Acrosome
(c) Allosome
(d) Autosome
Answer: (b)

4.Part of fallopian tube closest to ovary is
(a) Infundibulum
(b) Cervix
(c) Ampulla
(d) Isthmus
Answer: (a)

5.Ovulation occurs under the influence of
(a) LH
(b) FSH
(c) Estrogen
(d) Progesterone
Answer: (a)

6.Ovulation in human female occurs at
(a) beginning of proliferative phase
(b) end of proliferative phase
(c) middle of secretory phase
(d) end of secretory phase
Answer: (b)

7.Outer layer of blastocyst that gives rise to ectoderm is
(a) trophoblast
(b) germinal vesicle
(c) Cnidoblast
(d) amnion
Answer: (a)

8.Oocyte is liberated from ovary under the influence of LH, after completing
(a) Meiosis and before liberating polar bodies
(b) Meiosis I and before liberating polar bodies
(c) Meiosis
(d) Meiosis I after release of polar body
Answer: (d)

9.Onset of menstrual cycle at the time of puberty is called
(a) Menopause
(b) Menarche
(c) Menstruation
(d) Metamerism
Answer: (b)

10.One primary spermatocyte produces four spermatozoa but one primary oocyte produces
(a) Four ova
(b) One ovum
(c) Two ova
(d) Sixteen ova
Answer: (b)

11.Nutritivecells of seminiferous tubules are
(a) Sertoli cells
(b) Leydig cells
(c) Spermatogonial cells
(d) Spermatocytes
Answer: (a)

12.Number of eggs released in the life time of a woman is approximately
(a) 40
(b) 400
(c) 4000
(d) 20000
Answer: (b)

13.Notochord, skeletal system and dermis of skin are derivatives of
(a) all the three germinal layers
(b) mesoderm
(c) Endoderm
(d) Ectoderm
Answer: (b)

14.Network of capillaries inside the testis is present in
(a) Rete testis
(b) Tunica vasculasa
(c) Seminiferous tubules
(d) efferent duct
Answer: (b)

15.Multicellular, multinucleated irregular mass of embryo which passes into uterine wall is
(a) Ectoderm
(b) Endoderm
(c) Syncytiotrophoblast
(d) Amnion
Answer: (c)

16.Morphogenetic movements take place during
(a) Formaiton of morula
(b) Blastulation
(c) Gastrulation
(d) Organogenesis
Answer: (c)

17.Middle piece of sperm has
(a) nucleus
(b) mitochondria
(c) centriole
(d) ribosomes
Answer: (b)

18.Middle piece of sperm contains
(a) Nucleus
(b) Acrosome
(c) Manchette
(d) Mitochondria
Answer: (d)

19.Middle piece of mammalian sperm possesses
(a) Mitochondria and centriole
(b) Mitochondria only
(c) Centriole only
(d) Nucleus and mitochondria
Answer: (a)

20.Middle piece of mammalian sperm contains
(a) Nucleus
(b) Vacuole
(c) Mitochondria
(d) Centriole
Answer: (c)

Seminal vesicles are located in


1.Seminal vesicles are located in
(a) Caput epidydimis
(b) Uterus
(c) Above Cowper’s glands
(d) Glans penis
Answer: (c)

2.Seminal plasma of human males is rich in
(a) Glucose and calcium
(b) DNA and testosterone
(c) ribose and K+
(d) Fructose and Ca2+
Answer: (d)

3.Semen contains
(a) fructose
(b) glucose
(c) lactose
(d) galactose
Answer: (a)

4.Select the odd one on of the basis of origin
(a) Skin
(b) Lungs
(c) Liver
(d) Trachea
Answer: (a)

5.Secretion of progesterone by corpus luteum is initiated by
(a) MSH
(b) LH
(c) Testosterone
(d) Thyroxine
Answer: (b)

6.Secondary sexual characters in females develop in response of hormone
(a) Relaxin
(b) Progesterone
(c) Estrogen
(d) Gonadotrofain
Answer: (c)

7.Role of placenta is to
(a) provide nutrition to embryo
(b) protect embryo from shocks
(c) act as a storage organ
(d) convey nerve impulses
Answer: (a)

8.Ripe ova are shed by ovaries into
(a) coelom
(b) oviducal funnel
(c) oviduct
(d) collecting tubules of kidney
Answer: (a)

9.Repairing of endometrium takes place during
(a) secretory phase
(b) ovulatory phase
(c) pre menstrual phase
(d) proliferative phase
Answer: (d)

10.Removal of both ovaries in rat will result in decreased tire of
(a) Estrogen
(b) Gonadotrophic releasing factor
(c) Prolactin
(d) Oxytocin
Answer: (a)

11.Release of seminal fluid in the vagina of female is
(a) Ejaculation
(b) Implantation
(c) Insemination
(d) Copulation
Answer: (c)

12.Rearrangement of layers occurs during
(a) Gastrulation
(b) Blastulation
(c) Morulation
(d) Organogensis
Answer: (a)

13.Proximal centriole of sperm is located in
(a) Head
(b) Neck
(c) Middle piece
(d) Tail
Answer: (b)

14.Prostate gland produces a secretion for
(a) attracting sperms
(b) stimulating sperm activity
(c) inhibiting sperm activity
(d) none of the above
Answer: (b)

15.Prostate gland is present
(a) on ureter
(b) on kidney
(c) on testis
(d) around urethra
Answer: (d)

16.Product of corpus luteum is
(a) Progesterone
(b) Estrogen
(c) Testosterone
(d) Estradiol
Answer: (a)

17.Primative streak which gives rise to mesoderm is formed by
(a) Ectoderm
(b) Endoderm
(c) Yolk sac
(d) Amniotic cavity
Answer: (a)

18.Primative streak is formed from
(a) Trophoblast
(b) Endoderm
(c) Ectoderm
(d) Mesoderm
Answer: (c)

19.Pregnancy hormone is
(a) Estrogen
(b) Luteinising hormone
(c) Progesterone
(d) both a and b
Answer: (c)

20.Polar bodies develop during
(a) Oogenesis
(b) Spermatogenesis
(c) Spermiogenesis
(d) Soamtic hybridisation
Answer: (a)

The first germ layer formed in the embryo is


 1.The first germ layer formed in the embryo is
(a) Ectoderm
(b) Endoderm
(c) Mesoderm
(d) Extra embryonal mesoderm
Answer: (b)

2.The cavity contained in graafian follicle is
(a) Antrum
(b) Centrocoel
(c) Blastocoel
(d) Archenteron
Answer: (a)

3.Testis is
(a) Endodermal
(b) Ectodermal
(c) Mesodermal
(d) Extramesodermal
Answer: (c)

4.Testes descend into scrotum in mammals for
(a) Spermatogenesis
(b) Fertilization
(c) Development of sex organs
(d) Development of visceral organs
Answer: (a)

5.Temporary pairing of parents for fusion of gametes is called
(a) Copulation
(b) Conjugation
(c) Communication
(d) Coagulation
Answer: (b)

6.Surgical removal of uterus is
(a) Tubectomy
(b) Hysterctomy
(c) Vasectomy
(d) Orchidectomy
Answer: (b)

7.Sperms remain alive in female genital tract for days
(a) 1
(b) 3
(c) 5
(d) 7
Answer: (a)

8.Sperms produce an enzymatic substance for dissolving egg coverings. It is called
(a) Hyaluronic acid
(b) Hyaluronidase
(c) Androgamone
(d) Diastase
Answer: (b)

9.Sperms are stored and nourished inside
(a) testis
(b) Epididymis
(c) Seminiferous tubules
(d) vasa efferentia
Answer: (b)
10.
Spermiogenesis changes
(a) Spermatogonium to primary spermatocyte
(b) Primary spermatocyte to secondary spermatocyte
(c) Secondary spermatocyte to spermatid
(d) Spermatid to sperm
Answer: (d)

11.Spermatozoa are nourished during their development by
(a) Sertoli cells
(b) Interstitial cells
(c) Connective tissue cells
(d) None of the above
Answer: (a)
12.
Spermatogonia undergo a growth phase to become
(a) spermatozoa
(b) Primary spermatocyte
(c) Secondary spermatocyte
(d) Spermatid
Answer: (a)

13.Spermatogenesis without meiosis occurs in
(a) birds
(b) bees
(c) bat
(d) none of the above
Answer: (b)

14.Sperm of animal species a cannot fertilise ovum of species b because
(a) Fertilizins of a and b are not compatible
(b) Antifertilizins of a and b are not compatible
(c) Fertilizin of a and antifertilizin of b are not compatibel
(d) Antifertilizin of a and fertilizing of b are not compatibel
Answer: (d)

15.Sperm capacitation involves
(a) Change in shape
(b) Release of mitochondria
(c) Removal of membrane fatty acids
(d) Hyaluronic acid
Answer: (c)

16.Smooth muscles lining the wall of scrotum are called
(a) Deltoid muscles
(b) Dartos muscles
(c) Gluteal muscles
(d) Latissimus dorsi muscles
Answer: (b)

17.Site of vitellogenesis is
(a) Secondary oocyte in fallopian tube
(b) Primary occyte in graafian follicle
(c) Primary spermatocyte in testis
(d) Secondary spermatocyte in testis
Answer: (b)

18.Site of fertilization in a mammal is
(a) Ovary
(b) Uterus
(c) Vagina
(d) Fallopian tube
Answer: (d)

19.Sertoli cells occur in
(a) Heart
(b) Liver
(c) Ovary
(d) Seminiferous tubules
Answer: (d)

20.Sertoli cells are found
(a) between the seminiferous tubules
(b) In the germinal epithelium of ovary
(c) In the uppermost part of fallopian tube
(d) in the germinal epithelium of seminiferous tubules
Answer: (d)

Types of asexual reproduction found in hydra is


1.What is false?
(a) Menarche is beginning of menstruation
(b) Menstruation is shedding of endometrial lining
(c) Menopause occurs in the beginning of puberty
(d) Ovulation occurs under high tire of LH
Answer: (c)

2.Various parts of male urethra are
(a) Prostatic, bulbourethra and ejaculatory
(b) Prostatic, membranous and penile
(c) Corpora cavernosa and corpus spongiosum
(d) Prostatic, bulbourethal and glans
Answer: (b)

3.Types of asexual reproduction found in hydra is
(a) Sporulation
(b) Gemmule formation
(c) Bianry fission
(d) Budding
Answer: (d)
4.
Type of cleavage that occurs in human zygote
(a) Holoblastic and equal
(b) Holoblastic and unequal
(c) Meroblastic
(d) Meroblastic and superficial
Answer: (b)

5.Twins joined in various regions are
(a) Fraternal twins
(b) Identical twins
(c) Siamese twins
(d) non-identical twins
Answer: (c)

6.Thick layer which immediately surrounds the ovum is
(a) Zona pellucida
(b) Membrana granulosa
(c) Corona radiata
(d) vitelline membrane
Answer: (a)

7.The single layer of germinal epithelium covering the ovary is composed of
(a) squamous cells
(b) cuboidal cells
(c) columnar cells
(d) none of the above
Answer: (b)
8.
The shortest phase in menstrual cycle is
(a) Menstrual phase
(b) Secretory phase
(c) Ovulatory phase
(d) Proliferative phase
Answer: (c)

9.The sense organs are developed from
(a) ectoderm
(b) mesoderm
(c) endoderm
(d) different germ layers
Answer: (a)
10.
The role of sertoli cells in spermatogenesis is
(a) they direct morphogenesis of sperms
(b) they provide nutrition to developing sperms
(c) both a and b
(d) they stimulate germinal epithelium
Answer: (c)

11.The role of Leydig cells is
(a) Nourishment of sperms
(b) Give motility to sperms
(c) Synthesize testosterone hormone
(d) Undergo spermatogenesis
Answer: (c)

12.The path, where male nucleus fuses with female pronucleus, is known as
(a) Fertilization path
(b) Penetration path
(c) Copulation path
(d) none of the above
Answer: (a)
13.
The morula is formed during cleavage after
(a) 2 days of fertilization
(b) at the end of third day of fertilization
(c) 4 days after fertilization
(d) 7 days of fertilization
Answer: (b)

14.The membrane which holds ovary in position is called
(a) mesorchium
(b) mesovarium
(c) parietal peritoneum
(d) mesosalpinx
Answer: (b)
15.
The lytic enzyme released by sperm is
(a) Acrosome
(b) Ligase
(c) Androgenase
(d) Hyalouronidase
Answer: (d)

16.The length of tube in the epididymis of a testis is
(a) 3 meters
(b)  meters
(c) 5 meters
(d) 6 meters
Answer: (d)

17.The internal cavity commonly formed by cell division prior to gastrulation is
(a) Enteron
(b) Blastopore
(c) Blastocoel
(d) Coelom
Answer: (c)
18.
The hormone responsible for maintaining the pregnancy is
(a) LH
(b) FSH
(c) Progesterone
(d) Oestrogen
Answer: (c)

19.The head of mature mammalian sperm is made of
(a) An acrosome
(b) Elongated nucleus covered by acrosome
(c) Two centrioles and an aial filament
(d) Nucleus, acrosome, cytoplasm and mitochondrial sheath
Answer: (b)

20.The gravid phase of uterus is
(a) proliferative phase
(b) ovulatory phase
(c) secretary phase
(d) none of the above
Answer: (d)