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)