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Which of the following is the correct pairing of process and site?

(a) ATP synthesis by ATP synthase - thylakoid membrane Correct
(b) Carboxylation of RuBP - grana thylakoids Your answer
(c) Calvin cycle - lumen of the thylakoid Your answer
(d) Water splitting - stroma of the chloroplast Your answer

Your answer: Correct answer: (a)

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Explanation

Why (a) is correct

ATP synthase is located in the thylakoid membrane, so ATP synthesis takes place there.

Why the other options are wrong

(b) · your answer Carboxylation of RuBP takes place in the stroma.
(c) · your answer The Calvin cycle runs in the stroma, not the lumen.
(d) · your answer Water is split on the lumen side of the thylakoid membrane.

NCERT point: ATP is released into the stroma, where it is used.

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