Describe the process of cyclic photophosphorylation

Describe the process of cyclic photophosphorylation

(i) Light strikes chlorophyll molecule PSI

(ii) an electron is excited, passes through electron carrier system and return to PSI

(iii)  in the process,  H⁺ builds up in the thylakoid space creating a gradient. Then the passage of H⁺ out of the thylakoid provides energy for synthesizing ATP.

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