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Ferredoxin is a constituent of
Your answer:
Correct answer: (a)
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Explanation
Why (a) is correct
Ferredoxin is an iron-sulphur protein that takes electrons from PS I and passes them to NADP+ (via NADP reductase), or back to the cytochrome complex in cyclic flow. So it belongs with PS I.
Why the other options are wrong
- (b) · your answer P680 is the reaction centre of PS II; ferredoxin works on the PS I side.
- (c) · your answer The Hill reaction is the release of O2 by isolated chloroplasts with an electron acceptor; ferredoxin is not called a constituent of it.
- (d) · your answer Ferredoxin receives electrons from PS I, not PS II.
NCERT point: In the Z scheme, electrons from PS I go to ferredoxin and then to NADP+.
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