Electron Transport in Photosynthesis

Photosynthesis of prokaryotic cyanobacteria as well as that of eukaryotic algae and higher plants produces oxygen and the basic process is similar in them all.

A form of the Hill and Bendall ‘Z’ scheme of the sequence of processes and electron transport leading from water-splitting through NADP+ reduction is explained below.

Photon capture by the photosystem antennae and excitation transfer to PSII & I provide the energy for oxidation of water and electron movement to acceptors, which donate e to biochemical processes, and for passage of protons into thylakoid lumen, for synthesis of ATP. The electron transport system may be considered in five parts:

a)A water-splitting complex
b)A photosystem complex

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