NEET Biology Photosynthesis In Higher Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Photosynthesis In Higher Plants Topic Based

Question & Answer Discuss:

In photosystem-I the first electron acceptor is

(a) Plastocyanin

(b) Cytochrome

(c) An iron-sulphur protein

(d) Ferredoxin

Answer: (c)

In Photosystem I or Photoact I electrons released by P-700 are accepted by a substance of iron-sulphur-protein complex denoted as A(FeS). A(FeS) is thus reduced and it passes these high electrons to oxidised ferredoxin and it gets reduced. From reduced Fd these electrons are passed to FAD which now reduced to $FADH_{2}$ and then electrons and hydrogen are accepted by NADP which makes $NADPH_{2}$. Here photosystem I ends.

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