MCQs on Photosynthesis

MCQs on Photosynthesis

1. Photosynthesis occurs in
a. Chloroplast
b. Golgi body
c. Endoplasmic reticulum
d. Nucleus

2. The optimum temperature for photosynthesis is
a. 25-35℃
b. 10-15℃
c. 35-40℃
d. 20-25℃

3. Photorespiration occurs in
a. Four cell organelles
b. Two cell organelles
c. One cell organelle
d. Three cell organelle

4. Reduction of NADP occurs in
a. Oxidative photophosphorylation
b. Cyclic photophosphorylation
c. Non-cyclic photophosphorylation
d. None

5. Kranz anatomy is found in the leaves of
a. Wheat
b. Mustard
c. Potato
d. Sugarcane

6. Peroxisomes are involved in which type of reactions
a. Calvin cycle
b. Glyoxylate cycle
c. Glycolate cycle
d. Bacterial photosynthesis

7. Photorespiration involves oxidation of
a. PGA
b. RuBP
c. Chlorophyll a
d. Both a and b

8. C3 and C4 plants differ with respect to
a. Number of ATP molecules consumed
b. First product
c. The substrate which accepts carbon dioxide
d. All

9. In Calvin cycle, 1 molecule of glucose is formed from
a. 6CO2 + 30ATP + 12NADPH
b. 6CO2 + 12ATP
c. 6CO2 + 18ATP + 12NADPH
d. 6CO2 + 18ATP + 30NADPH

10. Where does the light reaction takes place?
a. Grana
b. Stroma
c. Cytoplasm
d. Endoplasmic reticulum

11. Electrons from the excited chlorophyll molecules of PS-II are first accepted by
a. Pheophytin
b. Ferredoxin
c. Cytochrome f
d. Cytochrome b

12. Non-cyclic photophosphorylation results in the production of
a. NADH
b. NADPH
c. ATP
d. ATP and NADPH

13. DCMU inhibits
a. PS-I
b. PS-II
c. Oxidative phosphorylation
d. It destroys chloroplast

14. Maximum photosynthesis occurs in
a. Blue light
b. Red light
c. White light
d. Green light

15. The first acceptor of CO2 in C4 plants is
a. Aspartic acid
b. Malic acid
c. Oxaloacetic acid
d. Phosphoenolpyruvate

16. The first product of C4 pathway is
a. PGA
b. DHAP
c. Oxaloacetate
d. Phosphoenolpyruvate

17. The two pigment system theory of photosynthesis was proposed by
a. Aron
b. Blackman
c. Hill
d. Emerson

18. H2 donor during photosynthesis is
a. ATP
b. NADP
c. NADPH
d. NADH

19. The minerals involved in splitting reaction during photosynthesis is
a. Potassium and manganese
b. Magnesium and chlorine
c. Potassium and chlorine
d. Manganese and chlorine

20. The water-soluble photosynthetic pigment is
a. Chlorophyll a
b. Xanthophyll
c. Anthocyanin
d. Chlorophyll b

Answer Key

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