Question

Identify a - d in the above figure

• A. a - PSII, b - ETS, c - e^- acceptor, d - P₆₈₀
• B. a - PSI, b - Cyt.b₆/t, c - Fd, d - PSI
• C. a - e^- acceptor, b - ATP synthase, c - P₇₀₀, d - LHC
• D. a - PSI, b - ETS, c - PSII, d - LHC

Answer 1

The correct option is A

a - PSII, b - ETS, c - e^- acceptor, d - P₆₈₀

In cyclic photophosphorylation, PSI alone participates. The electron released from $P_{700}$ after passing through ETS reaches back to $P_{700}$. It involves a cyclic movement of electrons and synthesis of ATP by ATP synthase.