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Question

In photosystem- I, the first electron acceptor is

A
An iron-sulphur protein
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B
Plastoquinone
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C
Cytochrome
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D
Plastocyanin
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Solution

The correct option is A An iron-sulphur protein
Photosystem- I (PS- I) is an integral membrane protein complex that absorbs solar energy and mediate electron transfer from plastocyanin to ferredoxin. Ferredoxin is the iron-containing sulphur protein, which is the first pigment that accepts electrons. The PS- I system comprises more than 110 cofactors, significantly more than photosystem- II.

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