Question

Differentiate between cyclic and non-cyclic photophosphorylation.

Answer 1

Cyclic Photophosphorylation	Noncyclic photophosphorylation
It is released with PS I.	It is associated with both PSI 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 oxygen do not occur.	Photolysis of water and evolution of evolution of oxygen occurs.
Photophosphorylation occurs at two places.	Photophosphorylation takes place only at one place.
NADP${}^{+}$ is not reduced.	NADP${}^{+}$ is reduced to NADPH${}_2$.