Photolysis of water is caused by (1) PS - I (2) PS - II (3) PS - 1 and PS - II (4) None of the above

Answer: (2)

Photolysis of water in the presence of sunlight is the breakdown of the water molecule into hydrogen and oxygen. During the first photosynthesis step,  ps-II (p680) absorbs the light energy. The chlorophyll electrons are energized to the excited state and absorbed by the electron acceptor. When the electron fall to the ground state, due to the presence of photons the water molecules splits.

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