Where does cyclic occur?

Where does cyclic occur?

Cyclic photophosphorylation This form of photophosphorylation occurs on the stroma lamella, or fret channels. In cyclic photophosphorylation, the high-energy electron released from P700 of PS1 flows down in a cyclic pathway.

Why does cyclic electron flow occur?

In higher plants, the generation of proton gradient across the thylakoid membrane (ΔpH) through cyclic electron flow (CEF) has mainly two functions: (1) to generate ATP and balance the ATP/NADPH energy budget, and (2) to protect photosystems I and II against photoinhibition.

How does cyclic photophosphorylation occur?

Cyclic Photophosphorylation happens with the help of photosynthesis, a process of producing carbohydrates by green plants using carbon dioxide and water in the presence of sunlight. In this reaction, the addition of phosphate in the presence of light or the synthesizing of ATP by cells is known as photophosphorylation.

Where does cyclic phosphorylation occur?

Cyclic photophosphorylation takes place in chloroplasts in the leaves. It takes place in the stroma lamellae membrane or fret channels of chloroplasts. The process of cyclic photophosphorylation involves only photosystem I.

Does cyclic photophosphorylation occur in Grana?

Complete answer: The cyclic photophosphorylation usually occurs in the stroma lamellae membrane of the leaves. The membrane or lamella of the grana have both PS I and PS II, the stroma lamellae membranes lack PS II as well as NADP reductase enzyme.

Which product is formed during cyclic electron transport?

Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I (P700) but not photosystem II (P680). This process produces no NADPH and no O2, but it does make ATP. This is called cyclic photophosphorylation.

What is cyclic and noncyclic?

Both Photosystem I and II are involved in the process. In Cyclic PhotophosphorylationP700 is the active reaction center. In non-Cyclic PhotophosphorylationP680 is the active reaction center. Electrons passes in a cyclic manner. Electrons passes in a non – cyclic manner.

Does cyclic photophosphorylation produce NADPH?

In another form of the light reactions, called cyclic photophosphorylation, electrons follow a different, circular path and only ATP (no NADPH) is produced.

Which one does not occur in cyclic photophosphorylation?

NADPH formation does not take place in cyclic photophosphorylation. In this pathway, only a single molecule of ATP is synthesised.