Question

NADPH2 is generated through

(a) photosystem II

(b) anaerobic respiration

(c) glycolysis

(d) photosystem I.

Answer 1

Option d is correct

Explanation : Non-cyclic photophosphorylation involves both PS-I and PS-II. Here electrons are not cycled back and are used in the reduction of NADP to NADPH2. Here one molecule of ATP is produced between plastoquinone and cytochrome f, whereas in cyclic photophosphorylations only PS-I is involved.

Here electrons from p-700 are recycled back to p-700. It involves production of two ATP molecules, no NADPH, is produced. Hence only PS-I produces NADPH2.