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Consider these statements about factors affecting photosynthesis.
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Consider these statements about factors affecting photosynthesis.
(A) Light saturation occurs at 10% of full sunlight.
(B) At high light, both C3 and C4 plants show higher rates with more CO2.
(C) The light reactions are much more sensitive to temperature than the dark reactions.
(D) Greenhouse tomatoes give higher yields in CO2-enriched air.
Which statements are correct?
Your answer:
Correct answer: (c)
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Explanation
Why (c) is correct
A, B and D are correct. C is wrong: the dark (enzymatic) reactions are more sensitive to temperature than the light reactions.
Why the other options are wrong
- (a) · your answer C is wrong, and B and D are also correct.
- (b) · your answer C is wrong.
- (d) · your answer C is wrong.
NCERT point: Temperature affects enzyme-driven reactions most.
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