Question

The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because

(a) starch is the immediate product of photosynthesis.

(b) glucose formed in photosynthesis soon gets converted into starch.

(c) starch is soluble in water.

(d) sugar cannot be tested.

Answer 1

(b) glucose formed in photosynthesis soon gets converted into starch

This glucose is utilised by the plant and extra glucose is stored in form of starch in the leaves. As glucose gets utilised so its presence cannot be detected. But starch is stored in plants and it can be easily detected, hence production of starch is often used as a measure of photosynthesis in leaves.