NEET · BiologyHard

$During the light-dependent reactions, the proton gradient across the thylakoid membrane is generated by several processes. Which of the following contributes to the formation of this gradient by consuming protons in the stroma?$

Show correct answer & step-by-step solution

Correct answer: B — $Reduction of NADP^{+} to NADPH .$

Solution

$The proton gradient is defined by the difference in H^{+} concentration between the lumen and the stroma.$
$The reaction NADP^{+} + 2 e^{-} + 2 H^{+} \to NADPH + H^{+} occurs on the stromal side of the thylakoid membrane.$
$This reaction removes H^{+} from the stroma, increasing the gradient.$
$Hence the answer is (B).$