Back to your test review

NADP⁺ is reduced to NADPH in

(a) Calvin cycle Your answer
(b) cyclic photophosphorylation Your answer
(c) PS II Your answer
(d) non-cyclic photophosphorylation Correct

Your answer: Correct answer: (d)

Advertisement

Explanation

Why (d) is correct

In non-cyclic photophosphorylation, electrons from water pass through PS II and PS I and finally reduce NADP⁺ to NADPH (with NADP reductase).

Why the other options are wrong

(a) · your answer The Calvin cycle uses NADPH (it oxidises it to NADP⁺); it does not reduce NADP⁺.
(b) · your answer In cyclic flow the electrons return to PS I, so NADP⁺ is not reduced.
(c) · your answer PS II alone does not reduce NADP⁺; the electrons reach it only after PS I.

NCERT point: NADPH and ATP from the light reaction are used to reduce 3-PGA in the Calvin cycle.

Thank you! We will check this question.

Practise Photosynthesis in Higher Plants

Take a free 15-question NEET Biology test on this chapter. Timed, scored instantly.

Start free test

Similar questions

Which one of the following products diffuses out of the chloroplast during photosynthesis? Observe the figure. Identify the stages labelled A, B and C. How many molecules of ATP and NADPH are required for every molecule of CO2 fixed in the Calvin cycle?