The electron transport chain during the light reaction of photosynthesis proceeds as follows:
1. Pheophytin acts as the primary electron acceptor in Photosystem II.
2. Electrons are transferred to Plastoquinone, which carries them to the Cytb6-f complex.
3. The Cytb6-f complex facilitates the transfer of electrons to Plastocyanin, which carries electrons to Photosystem I.
| List I (Enzyme) | List II (Function) |
|---|---|
| (A) Cytochrome oxidase | (I) Electron transport system |
| (B) Topoisomerases | (II) Change linking number |
| (C) Cohesins | (III) DNA Replication |
| (D) PCNA | (IV) Cell cycle |