Question

What is the difference between Non-cyclic Photophosphorylation Cyclic-Photophosphorylation?

Answer 1

S.No	CYCLIC PHOTOPHOSPHORYLATION	NON-CYCLIC PHOTOPHOSPHORYLATION
1.	Photo system I carry out the reaction.	Photo system I and II carry out the reaction.
2.	Active reaction center is P700.	Active reaction center is P680.
3.	Movement of electrons is cyclic.	Movement of electron is non-cyclic.
4.	There is no photolysis of water during the reaction.	There is a photolysis of water during the reaction.
5.	No production of oxygen.	Oxygen is produced as a byproduct.
6.	Electrons from PS I comes back to PS I.	Electrons from PS I are accepted by the NADPH.
7.	During this reaction only ATP is produced.	Both ATP and NADP are produced during the reaction.
8.	It mainly occurs in bacteria.	It mainly occurs in plants.