Question

Assertion (A): The Calvin cycle is a part of the light-dependent reactions in photosynthesis.

Reason (R): The Calvin cycle is responsible for the synthesis of ATP and NADPH.

Options

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

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

• A is true but R is false.

• A is false but R is true.

Answer 1

A is false but R is true.

Explanation:

The assertion is completely false because the Calvin cycle is the core part of the light-independent reactions (or dark reactions) of photosynthesis, taking place in the stroma rather than the thylakoid membranes. The reason is also technically false because the Calvin cycle consumes ATP and NADPH to fix carbon dioxide into glucose, whereas the synthesis of ATP and NADPH occurs exclusively during the light-dependent thylakoid reactions.