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Charge separation (conversion of light energy into chemical energy) in a photosystem takes place at the
Your answer:
Correct answer: (d)
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Explanation
Why (d) is correct
Charge separation happens at the reaction centre. The excited chlorophyll a molecule there gives up an electron to an acceptor, and light energy becomes chemical energy.
Why the other options are wrong
- (a) · your answer Antenna molecules only absorb light and pass the energy on; they do not lose electrons.
- (b) · your answer The outer chloroplast membrane plays no part in the light reaction.
- (c) · your answer The stroma is the site of the Calvin cycle, not of charge separation.
NCERT point: Antenna pigments funnel energy to the reaction centre (P680 or P700).
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