Assertion (A): Plants carry out photosynthesis during the day and respiration at night. Reason (R): Photosynthesis requires light, while respiration occurs continuously. MCQ with Answer and Explanation

Question

Assertion (A): Plants carry out photosynthesis during the day and respiration at night.
Reason (R): Photosynthesis requires light, while respiration occurs continuously.

A. A is false, but R is true.

B. Both A and R are true, and R is the correct explanation.

C. Both A and R are true, but R is not the correct explanation.

D. A is true, but R is false.

Answer: Option A

Solution (By JKSSB Mock Tests)

Respiration occurs 24/7, while photosynthesis only in light. The statement implies they alternate, which is false. R is true: photosynthesis needs light, respiration is continuous. So A is false, R true.

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Consider statements about human anatomy: 1. The brain is the control center of the nervous system. 2. The heart is the pump of the circulatory system. 3. The lungs are the organs of the respiratory system. Which are correct?

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Correct Answer: Option D

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