Question

primary electron acceptor in cyclic photophosphorylation is

Answer 1

Hi there,

In photo-phosphorylation, the primary electron acceptor is the photosystem I(P700). What happens is that when the electrons are photo-excited, some of the electrons tend to change their traveling path.

Due to this reason, they are accepted by the photo-system I(P700) instead of the photo-system II (P800). In this process, no oxygen and no NADPH is produced

This is the reason it is called cyclic photo-phosphorylation.

Thanks for asking.

Answer 2

“Primary electron acceptor” in cyclic photophosporylation is not specific. It is generally called as “primary electron acceptor” in both cyclic as well as non-cyclic photophosporylation.

Explanation:

In cyclic photophosporylation, “electrons released by P700” of photo system I in presence of light are taken by primary acceptor and then passed to ‘Ferrodoxin’, ‘Plastoquinone’, ‘Cytochrome complex’, ‘plastocyanin’, and finally back to P700 that is electron comes back to same molecules in this process.