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In light reaction, plastoquinone facilitates the transfer of electrons from

1. Cytb₆f complex to PS-I
2. PS-I to NADP⁺
3. PS-II to ATP synthase
4. PS-II to Cytb₆f complex

Correct answer: PS-II to Cytb₆f complex

Solution

Plastoquinone (PQ) is a lipid-soluble electron carrier in the thylakoid membrane. In the light reactions, it accepts electrons from PS-II and transfers them to the cytochrome b6f complex.

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