Question

Cyclic and non cyclic photophosphorylation

Answer 1

Answer:

CYLIC PHOTOPHOSPHORYLATION

It can be defined as the synthesis of ATP coupled to electron transport activated by Photosystem I solely, and can therefore proceed in long-wave-length light (03BB 2265 700 nm). This proces is unaffected by the specific inhibitors of Photosystem II, such as CMU, DCMU and orthophenanthroline.

NON - CYLIC PHOTOPHOSPHORYLATION

The photophosphorylation process which results in the movement of the electrons in a non-cyclic manner for synthesizing ATP molecules using the energy from excited electrons provided by photosystem II is called as non-cyclic photophosphorylation.

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Answer 2

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Answer:

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. Electrons return back to Photosystem I.