Question

Assertion (A): Oxygen is produced during light-dependent reactions of photosynthesis.

Reason (R): Oxygen is released as a byproduct during photolysis.

Options

• (A) is true and (R) is false.

• (A) is false and (R) is true.

• 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).

Answer 1

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

Explanation:

During the light-dependent reactions of photosynthesis (occurring in the thylakoid membranes), water molecules are split in a process called photolysis using light energy. This splitting releases oxygen as a byproduct, along with hydrogen ions and electrons used in ATP and NADPH formation.