Question

1.6) Differentiate between cyclic and non-cyclic photophosphorylation in photosynthesis.

Answer 1

1. In cyclic photophosphorylation only ATP is produced. In non-cyclic photophosphorylation both ATP and NADPH are produced.

2. In cyclic photophosphorylation, photolysis of water does not occur. In non-cyclic photophosphorylation,photolysis of water occurs.

3. In cyclic photophosphorylation, oxygen is not released. In non-cyclic photophosphorylation, oxygen is released.

4. Cyclic photophosphorylation occurs in photosystem I. Non-cyclic photophosphorylation occurs in both photosystem I and photosystem II.