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Electrons from the excited chlorophyll of photosystem II are accepted first by
Your answer:
Correct answer: (a)
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Explanation
Why (a) is correct
When P680 of PS II is excited, its electron is first taken up by a quinone (primary acceptor) and then passed on to plastoquinone and the rest of the chain.
Why the other options are wrong
- (b) · your answer Cytochrome f is part of the cytochrome b6f complex, further down the chain.
- (c) · your answer Ferredoxin takes electrons from PS I, not from PS II.
- (d) · your answer Cytochrome b is part of the cytochrome complex, not the first acceptor of PS II.
NCERT point: Each reaction centre passes its excited electron to a primary acceptor, and then along the electron transport chain.
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