The first food substance plants make in photosynthesis is Sugar

1.Quantasomes contain (CPMT 1982; MP PMT 1984)
(a) 200 chlorophyll molecules
(b) 230 chlorophyll molecules
(c) 250 chlorophyll molecules
(d) 300 chlorophyll molecules
Answer: (b)

2.Quantasomes occur on the surface of
(a) Cristae
(b) Plasmalemma
(c) Thylakoid membranes
(d) Peristromium
Answer : (c)

3.Ribulose biphosphate carboxylase enzyme catalyses the reaction between
(a) Oxaloacetic acid and acetyl CoA
(b) CO2 and ribulose 1, 5, biphosphate
(c) Ribulose biphosphate and phosphoglyceraldehyde
(d) PGA and dihydroxy acetone phosphate
Answer : (b)

4.Rubisco content of chloroplast is
(a) 5%
(b) 20%
(c) 11%
(d) 16%
Answer : (d)

5.Scientist awarded Nobel prize in 1961 for tracing the path of carbon in photosynthesis was
(a) Calvin
(b) Ruben
(c) Blackman
(d) Hatch
Answer : (a)

6.Sugarcane shows high efficiency of CO2 fixation because it performs
(a) Calvin cycle
(b) EMP pathway
(c) Hatch and Slack pathway
(d) TCA cycle
Answer : (c)

7.Synthesis of ADP + Pi  -----> ATP in grana is
(a) Phosphorylation
(b) Photophosphorylation
(c) Oxidative Phosphorylation
(d) Photolysis
Answer : (b)

8.The brown colour of some algae is due to the presence of pigments (Delhi PMT 1991)
(a) Chlorophyll
(b) Phycocyanin
(c) Carotene
(d) Fucoxanthin
Answer: (d)

9.The carbon dioxide acceptor in calvin cycle / C3 plants is
(a) Phospho-enol pyruvate (PEP)
(b) Ribulose1, 5 – Diphosphate (RuBP)
(c)  Phosphoglyceric acid (PGA)
(d) Ribulose monophosphate (RMP)
Answer : (b)

10.The empirical formula for chlorophyll a is
(a) C35H72O5N4Mg
(b) C65H70O6N4Mg
(c) C55H72O5N4Mg
(d) C45H70O6N4Mg
Answer : (c)

11.The enzyme that catalyses carbon dioxide fixation in C4 plants is
(a) RuBP carboxylase
(b) PEP carboxylase
(c) Carbonic anhydrase
(d) Carbxydismutase
Answer : (b)

12.The first carbon dioxide acceptor in C4 – plants is
(a) Phosphoenol – pyruvic acids
(b) Ribulose1, 5 - Diphosphate
(c) Oxalo- acetic acid
(d) Phosphoglyceric acid
Answer : (a)

13.The first experiment on photosynthesis in flashing light were carried out by (MP PMT 1990)
(a) F.F. Blackman
(b) Robert Emerson and Arnold
(c) Melvin Calvin
(d) Robert Hill
Answer: (b)

14.The first food substance plants make in photosynthesis is
(a) Sugar
(b) Starch
(c) Proteins
(d) Fats
Answer : (a)

15.The first product of CO2 fixation in C4 plants is
(a) OAA
(b) PGA
(c) Malic acid
(d) PEPA
Answer : (a)

16.The first product of CO2 fixation in Hatch and Stack plants is (CPMT 1983)
(a) Formation of oxalocetate by carboxylation of phosphoenol pyruvate (PEP in) bundle sheath cells
(b) Formation of phoshoglyceric acid in mesophyll cells
(c) Formation of bundle sheath cells
(d) Formation of oxaloacetate by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells
Answer: (d)

17.The first step in photosynthesis is the
(a) Joining of 3-carbon atom to form Glucose
(b) Formation of ATP
(c) Ionization of water
(d) Excitement of an electron of chlorophyll by photon of light
Answer : (d)

18.The full expansion of NADP is (Raj. PMT 1997)
(a) Nicotinamide adenine diphosphate
(b) Nicotinamide adenosine diphosphate
(c) Nicotinamide adenine dinucleotide phosphate
(d) Nicotinamide adenosine dinucleotide phosphate
Answer: (c)

19.The internal sorce of CO2 in C4 pathway is
(a) Oxaloacetic acid
(b) Malic acid
(c) RuBP
(d) Phosphoenol pyruvic acid
Answer : (b)

20.The isotope of carbon used extensively for studies in photosynthesis is
(a) 13C
(b) 14C
(c) 15C
(d) 16C
Answer : (b)