Question

NADP is converted into NADPH${}_2$ in

• A. Photosystem- I
• B. Non- cyclic photophosphorylation
• C. Calvin cycle
• D. Photosystem- II

Answer 1

The correct option is B Non- cyclic photophosphorylation

• Noncyclic photophosphorylation results in the production of $NADP{H}_2$ and involves photosystem I and II.
• While noncyclic photophosphorylation uses both photosystem I and photosystem II acting in series.
• In this, it transports a noncyclic electron. The active reaction center in noncyclic photophosphorylation is P${}_6$${}_8$${}_0$ and electrons travel in a noncyclic manner.
• The electrons from photosystem I is accepted by NADPH. In this process, both NADPH and ATP are produced.
• The process of photolysis or water splitting is present unlike cyclic photophosphorylation and towards the end, oxygen is evolved as a byproduct. The system happens to be most predominant in green plants.
  Hence, option B is correct.