Notes from NEET topper
Splitting of Water/photolysis of water
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The site of splitting of water is PSII.
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The water splitting complex is found to be associated with the PSII, which itself is physically located on the inner side of the membrane of the thylakoid, thus the site of splitting of water is PSII.
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The water is split into 2H+, [O] and electrons. This creates oxygen, one of the net products of photosynthesis.
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It is also known as photolysis of water as light is required for splitting of the water molecule.
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Manganese ion (Mg2+), chloride (Cl-) and calcium (Ca 2+) ion ion are required to carry out the photolysis of water.
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The electrons released by photolysis of water enters the electron transport chain and this creates a proton gradient across the thylakoid membrane.
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The breakdown of the proton gradient generates ATP.
2H2O 4H+ + O2 + 4e-
