• # question_answer In photosystem I, the first electron acceptor is: A)  FerredoxinB)  CytochromeC)  PlastocyaninD)  An iron sulphur protein

Correct Answer: D

Solution :

In photosystem I or photoact I electrons released by P-700 are accepted by a substance of iron-sulpur protein complex denoted as A (Fes). A (FeS) is thus reduced and it passes these high electron to oxidized ferredoxin and it gets reduced. From reduced Fd, these electrons are passed to FAD which are now reduced to $FAD{{H}_{2}}$and then electrons and hydrogen are accepted by NADP which makes$NADP{{H}_{2}}.$Here photosystem 1 ends.

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