Explain Photophosphorylation......?

(Photosynthetichosphorylation). Coupling of phosphate with ADP to make ATP, using light energy absorbed in photosynthesis. May be cyclic or non-cyclic; former results in formation of ATP only, latter in formation of ATP and hydrogen (used in CO2, reduction). See Photosynthesis.

Photosynthesis. A chemical process by which green plants synthesize organic compounds from carbon dioxide and water in the presence of sunlight. It occurs in the chloroplasts (mot of which are in the leaves) and there are two principal series of reactions. In the light reactions, which require the presence of light, energy from sun-light is absorbed by photosynthetic pigments (chiefly the green pigment chlorophyll) and converted into chemical energy.

The production of ATP using the energy of sunlight is called photophosphorylation.

 Only two sources of energy are available to living organisms: sunlight and oxidation-reduction (redox) reactions. All organisms produce ATP, which is the universal energy currency of life.
In photophosphorylation, light energy is used to create a high-energy electron donor and a lower-energy electron acceptor. Electrons then move spontaneously from donor to acceptor through an electron transport chain.

Types:
Cyclic photophosphorylation
Noncyclic photophosphorylation