In C3 plants, photosynthesis is decreased at higher temperatures due to increased photorespiration. C4 Plants have a higher temperature optimum because of the presence of pyruvate phosphate dikinase enzyme, which is sensitive to low temperature.
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
NEET UG 2017 — Botany Photosynthesis in Higher Plants
2017mcqmedium
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
Official previous-year question
Held on 30 Apr 2017 · Verified 9 Jul 2026.
Options
- A
Light saturation for CO2 fixation occurs at 10% of full sunlight
- B
Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate
- C
C3 plants respond to higher temperatures with enhanced photosynthesis, while C4 plants have a much lower temperature optimum
- D
Tomato is a greenhouse crop that can be grown in CO2 - enriched atmosphere for a higher yield
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NEET UG Photosynthesis in Higher Plants in other years
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How many molecules of ATP and NADPH are required for every molecule of $\mathrm{CO}_2$ fixed in the Calvin cycle?
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Given below are two statements: Statement I: In $\mathrm{C}_3$ plants, some $\mathrm{O}_2$ binds to RuBisCO, hence $\mathrm{CO}_2$ fixation is decreased. Statement II: In $\mathrm{C}_4$ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. In the light of the above statements, choose the correct answer from the options given below:
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