Multiple Choice Questions on Photosynthesis | Plant Physiology MCQ

16. The process of Photosynthesis is

a) Reductive, exergonic and catabolic
b) Reductive, endergonic and catabolic
c) Reductive, endergonic and anabolic
d) Reductive, exergonic and anabolic

17. A photosynthetic organism that does not release oxygen is

a) Blue green algae
b) Green alga
c) Green sulphur Bacterium
d) Lichen

18. Who was the first to study the influence of light during photosynthesis?

a) Van Niel
b) Blackmann
c) Warburg
d) J. Ingenhouz

19. 90% of the total photosynthesis is carried out by

a) algae
b) Mesophytes
c) Pteridophytes
d) Xerophytes

20. An essential process connected with photosynthesis is

a) Synthesis of glucose
b) Photolysis of water
c) Photophosphorylation
d) Breakdown of glucose

21. The site of the Dark reaction of photosynthesis is

a) grana
b) stroma
c) thaylakoids
d) Both (a) and (b)

22. Which of the following is least effective in photosynthesis?

a) Blue light
b) Green light
c) Red light
d) Sunlight

23. The hydrogen donor in bacterial photosynthesis is usually

a) Water
b) Ammonia
c) Sulphur
d) Hydrogen sulphide

24. The percentage of light energy fixed in photosynthesis is generally around

a) 0.1 %
b) 1 %
c) 10%
d) 100%

25. Light is necessary for the process of photosynthesis to

a) Split carbon dioxide
b) Produce ATP and a reducing substance
c) Release energy
d) combine carbon dioxide and water 

26. Plants have evolved to overcome  the affinity of Rubisco to Oxygen by spatial and time separation of carbon dioxide fixation from the vicinity of atmosphere having oxygen and carbon dioxide

a)  C2 cycle is separation in space and CAM in time respectively

b) CAM is separation in space and C4 cycle in time respectively

c) C4 cycle is separation in space and CAM in time respectively

d) C4 cycle is separation in space and C2 in time respectively

Learn more:  MCQ on Photosynthesis (Questions 1- 15)
Answers
16. d) Reductive, endergonic and anabolic
17. c) Green sulfur Bacterium
18. d) J. Ingenhouz
19. a) algae
20. b) Photolysis of water
21. b) stroma
22. b) Greenlight
23. d) Hydrogen sulfide
24. b) 1 %
25. b) Produce ATP and a reducing substance
26. c) C4 cycle is separation in space and CAM in time respectively