Question

Assertion (A): Light-independent reactions occur in the thylakoid membrane.

Reason (R): Thylakoid membranes contain pigments that capture light energy.

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 false because light-independent reactions (the Calvin cycle) occur in the fluid matrix of the chloroplast known as the stroma, not in the thylakoid membrane. However, the reason is entirely true because the thylakoid membranes physically house the photosynthetic pigments (like chlorophyll) that capture solar light energy during the light-dependent reactions.