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The site of the light reactions in the chloroplast is the

(a) stroma Your answer
(b) outer membrane Your answer
(c) thylakoid membrane Correct
(d) intermembrane space Your answer

Your answer: Correct answer: (c)

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Explanation

Why (c) is correct

The light reactions take place on the thylakoid membranes, which carry the pigments, photosystems, electron carriers and ATP synthase.

Why the other options are wrong

(a) · your answer The stroma is the site of the Calvin cycle (dark reactions).
(b) · your answer The outer membrane is part of the envelope; it plays no part in the light reaction.
(d) · your answer The space between the envelope membranes is not the site of the light reaction.

NCERT point: Light reactions: thylakoid membranes. Dark reactions: stroma.

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