In the journey of electrons from photosystem II to photosystem I plastocyanin is reduced by:
Correct answer: B. Cytochrome complex
- A. Plastoquinone
- B. Cytochrome complex
- C. P700
- D. Primary electron acceptor of PS1
Explanation
Plastocyanin is reduced when it accepts an electron from the cytochrome b6f complex, and this electron reduces the copper ion in plastocyanin from Cu²⁺ to Cu⁺. This process is essential for transferring electrons between photosystem II and photosystem I in the electron transport chain of photosynthesis.
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