​Which one of the following statements represents correct sequence of events during electron transport chain from P680 to P700 in a light reaction of photosynthesis in a typical plant?​

Correct option is C

The correct answer is (c).

The electron transport chain in the light reactions of photosynthesis proceeds in the following order:

1.      Pheophytin is the first electron acceptor in Photosystem II (PSII) after P680 is excited by light.

2.      The electrons from Pheophytin are transferred to Plastoquinone A, then to Plastoquinone B, which carries them further along the chain.

3.      The electrons from Plastoquinone B are transferred to the Cytochrome b6f complex.

4.      Finally, the electrons are transferred to Plastocyanin, which carries the electrons to P700 in Photosystem I (PSI) to continue the process.

Incorrect option-

Option (a): Starts with Plastocyanin which acts after Cytochrome b6f complex, so the order is incorrect.

Option (b): Places Plastocyanin before Cytochrome b6f, which is not accurate as Plastocyanin receives electrons after Cytochrome b6f.

Option (d): Incorrectly places Cytochrome b6f complex immediately after Pheophytin, skipping the plastoquinones, which is essential in the electron transport chain.