Question

In cyclic photophosphorylation the electron released by reaction centre is ultimately accepted by

• A. Ferredoxin
• B. $NAD{P}^{+}$
• C. Reaction centre
• D. Plastocynanin

Answer 1

Answer: (C)

Reaction centre

Photophosphorylation is a process of converting ADP to ATP in the presence of light. It takes place during the light reaction phase of photosynthesis.

The cyclic photophosphorylation takes place in the PS-I or photosystem one which has a single chlorophyll molecule 'a' as reaction centre. It has an absorption peak of 700nm.

The electron released from the reaction centre travels to the primary acceptor ferredoxin, then in the electron transport chain before returning back to the reaction centre.

So, the correct option is 'Reaction center'