Question

Electron vacancy in PSI in ETS is replaced by

• A. PSII
• B. Plastocyanin
• C. Photolysis of water
• D. None of these

Answer 1

The correct option is A PSII

• In the electron transport, while the membrane or lamellae of the grana have both PS I and PS II the stroma lamellae membranes lack PS II as well as NADP reductase enzyme.
• The excited electron does not pass on to NADP+ but is cycled back to the PSI complex through the electron transport chain.
• Hence, Electron vacancy in PSI in ETS is replaced by PSII.
• So, the correct answer is 'PSII'.