NEET Biology Photosynthesis In Higher Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Photosynthesis In Higher Plants Topic Based

Question & Answer Discuss:

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

(a) $C_{3}$ plants respond to higher temperatures with enhanced photosynthesis while $C_{4}$ plants have much lower temperature optimum

(b) Increasing atmospheric C$O_{2}$ concentration up to 0.05%can enhance C$O_{2}$ fixation rate

(c) Tomato is a greenhouse crop which can be grown in $CO_{2}$- enriched atmosphere for higher yield

(d) Light saturation for C$O_{2}$ fixation occurs at 10% of full sunlight

Answer: (a)

In $C_{3}$ plants photosynthesis decreases at higher temperatures due to increased photorespiration. $C_{4}$ plants have higher temperature optimum because of the presence of enzyme called pyruvate phosphatedikinase, which is sensitive to low temperature.

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