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Class 11 Biology MCQ Chapter 11 Photosynthesis in Higher Plants
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Photosynthesis in Higher Plants
Chapter – 11
UNIT – (IV) PLANT PHYSIOLOGY |
MCQ |
1. How many electrons and protons are produced during the photolysis of water?
(a) 4 electrons and 3 protons.
(b) 1 electron and 2 protons.
(c) 3 electrons and protons.
(d) 4 electrons and 4 protons.
Ans: (d) 4 electrons and 4 protons.
2. ___________ discovered the two-pigment system theory of light reaction?
(a) Emerson.
(b) Hill.
(c) Arnon.
(d) Mathew.
Ans: (a) Emerson.
3. Which among the following are raw materials required for the light reaction?
(a) NADPH2 and H2O.
(b) ADP and OH2.
(c) ATP only.
(d) ADP, H2O, and NADP.
Ans: (d) ADP, H2O, and NADP.
4. The reaction centre in the light-harvesting complex is formed by _____________.
(a) Chlorophyll (b).
(b) Gran(a).
(c) Chlorophyll e.
(d) A single chlorophyll a molecule.
Ans: (d) A single chlorophyll a molecule.
5. Which of the following is not related to the light reaction?
(a) Also called Photochemical phase.
(b) Light absorption.
(c) Electron transport.
(d) Water splitting.
Ans: (c) Electron transport.
6. How many light-harvesting systems are there in light reaction?
(a) Two.
(b) One.
(c) Three.
(d) Four.
Ans: (a) Two.
7. In which part of the chloroplast does the Calvin cycle take place?
(a) Thylakoid(d).
(b) Gran(a).
(c) Strom(a).
(d) Inner membrane.
Ans: (c) Strom(a).
8. What is the initial electron donor in photosynthesis?
(a) CO₂
(b) H₂O.
(c) O₂
(d) NADPH.
Ans: (b) H₂O.
9. During photosynthesis, oxygen is released as a byproduct from:
(a) Photolysis of water.
(b) Calvin cycle.
(c) Photorespiration.
(d) Glycolysis.
Ans: (a) Photolysis of water.
10. What is the primary pigment responsible for capturing light energy during photosynthesis?
(a) Chlorophyll (a).
(b) Chlorophyll (b).
(c) Carotenoids.
(d) Xanthophylls.
Ans: (a) Chlorophyll (a).
11. During photosynthesis, which molecule is the source of carbon that is fixed into organic compounds?
(a) Carbon dioxide (CO2).
(b) Oxygen (O2).
(c) Water (H2O).
(d) Glucose (C6H12O6).
Ans: (a) Carbon dioxide (CO2).
12. What is the primary product of the light-dependent reactions of photosynthesis?
(a) Glucose.
(b) ATP (Adenosine Triphosphate).
(c) Oxygen.
(d) Carbon dioxide.
Ans: (c) Oxygen.
13. In which part of the chloroplast do the light-independent reactions (Calvin cycle) occur?
(a) Stroma.
(b) Thylakoid membrane.
(c) Outer membrane.
(d) Inner membrane.
Ans: (a) Stroma.
14. During the Calvin cycle, what is the role of NADPH (Nicotinamide Adenine Dinucleotide Phosphate) and ATP?
(a) They are used to produce glucose.
(b) They capture light energy.
(c) They transfer high-energy electrons.
(d) They fix carbon dioxide.
Ans: (d) They fix carbon dioxide.
15. In C3 plants, what is the first stable compound formed during carbon fixation in the Calvin cycle?
(a) Glyceraldehyde-3-phosphate (G3P).
(b) 3-phosphoglyceric acid (3-PG(a).
(c) Ribulose-1,5-bisphosphate (RuBP).
(d) Phosphoenolpyruvate (PEP).
Ans: (b) 3-phosphoglyceric acid (3-PG(a).