Question

Write the differences between cyclic and non-cyclic photophosphorylation.

Answer 1

Cyclic photosphosphorylation	Non-cyclic photosphosphorylation
It is associated with PS - I.	It is associated with both PS - I and PS - II.
The electron expelled from chlorophyll molecule is cycled back.	The electrons are not cycled back but compensated by the electrons from photolysis of water.
Photolysis of water and evolution of oxygen do not take place.	Photolysis of water and evolution of oxygen take place.
Photophosphorylation takes place at two places.	Photophosphorylation takes plave only at one place.
NADP${}^{+}$ is not reduced.	NADP${}^{+}$ is reduced to NADPH${}_2$.