Botany-Calvin Cycle

NEET Botany Calvin Cycle Assertion Reason Question

Type: Assertion Reason-assertion-Medium-Class 11

Assertion (A): The Calvin cycle requires more ATP molecules than NADPH molecules for the synthesis of one glucose molecule. | Reason (R): Cyclic photophosphorylation compensates for the difference in ATP and NADPH requirements in the Calvin cycle.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true but (R) is not the correct explanation of (A).

C

(A) is true but (R) is false.

D

(A) is false but (R) is true.

Correct Answer

Option A

Detailed Explanation

According to the NCERT context, the Calvin cycle requires 18 ATP and 12 NADPH molecules for the synthesis of one glucose molecule. Cyclic photophosphorylation provides the additional ATP needed, explaining the assertion.

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