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In photosystem-I the first electron acceptor isA. cytochromeB. plastocyaninC. an iron-sulphur proteinD. ferredoxin

Answer» Correct Answer - C
In photosystem-I, the primary electron acceptor is probable a Fe-S protein. The reduced primary acceptor transfers the electrons to secondary electron acceptor (most probable `P_(430)`). The sequence of electron transfer is as follows:
`underset((chl" "-a^(+)))(P_(700))overset(e^(-))tounderset(("Phyloquinone"))(A_(1))overset(e^(-))tounderset(("Fe-S protein"))(A_(2))overset(e^(-))tounderset((P_(430)))(A_(3))`
The reduced `P_(430)` passess its electrons to ferredoxin (Fd) present at outer surface of thylakoid membrane.


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