Question

I. Cyclic photophosphorylation needs PS-I and PS-II.
II. Cyclic photophosphorylation produces $NADPH+H^{+}$ and ATP.
III. Cyclic photophosphorylation involves $H_{2}O$.
IV. Electrons are recycled in cyclic photophosphorylation.
Identify the correct and incorrect statements and select the option accordingly.

• A. I, II and III are incorrect, IV is correct
• B. I, II and IV are incorrect, III is correct
• C. I, II and III are incorrect, II is correct
• D. IV, III and II are incorrect, I is correct

Answer 1

Answer: (A)

Statements I, II and III are incorrect, IV is correct. Incorrect statements can be corrected as
* Cyclic photophosphorylation operates only by PS-I.
* During cyclic photophosphorylation, only ATP formation takes place and recyclation of electrons also occurs.
* Unlike, the non-cyclic phosphorylation, splitting of $H_{2}O$ does not take place in the cyclic phosphorylation.