The formation of ATP within the presence of sunlight is termed photophosphorylation. It is of 2 types: Non-cyclic photophosphorylation and Cyclic photophosphorylation. The photophosphorylation process which results in the movement of the electrons in a non-cyclic manner for synthesising ATP molecules using the energy from excited electrons provided by photosystem II is termed non-cyclic photophosphorylation. Cyclic Photophosphorylation could be a process of photophosphorylation in which an electron expelled by the excited photocentre is returned back to it after passing through a series of electron carriers.