Electron donor to PS I is

Ferredoxin

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FeS centre

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Plastoquinone

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Plastocyanin

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Solution

The correct option is C Plastocyanin
Plastocyanin is a copper-containing protein facilitates the electron-transfer in photosynthesis. In Photosystem II, it acts as electron carrier that donates electron from cytochrome b6f complex to the P700 of photosystem I.
So, the correct answer is option 'Plastocyanin'.

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Question 11
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