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Electrons from excited chlorophyll molecule of photosystem II are accepted first by:

1. Cytochrome-b
2. Cytochrome-f
3. Quinone
4. Ferredoxin

Correct answer: Quinone

Solution

In photosystem II, excited electrons leave chlorophyll and are first transferred to a quinone-type primary acceptor (via the PSII acceptor side). Cytochromes and ferredoxin act later in the electron transport chain, not as the first acceptor from PSII chlorophyll.

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