ATP synthesis in chloroplasts and mitochondri | vedclass

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Question

(D) In the chloroplast,the light-dependent reaction leads to the accumulation of protons $(H^+)$ in the thylakoid lumen due to the photolysis of water

Vedclass · Accepted Answer

$(a), (b)$ and $(d)$ are correct

Vedclass · Answer

(D) In the chloroplast,the light-dependent reaction leads to the accumulation of protons $(H^+)$ in the thylakoid lumen due to the photolysis of water and the pumping of protons by the electron transport chain.Statement $(a)$ is correct: Protons accumulate in the lumen of the thylakoid,creating a high concentration.Statement $(b)$ is correct: The splitting of water (photolysis) occurs on the inner side of the thylakoid membrane,releasing protons into the lumen.Statement $(c)$ is incorrect: Protons are depleted in the stroma as they are used by $NADP$ reductase.Statement $(d)$ is correct: $NADP$ reductase is located on the stroma side of the thylakoid membrane,where it reduces $NADP^+$ to $NADPH$ using electrons and protons from the stroma.Therefore,statements $(a), (b),$ and $(d)$ are correct.

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