photolysis

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photolysis A chemical reaction produced by exposure to light or ultraviolet radiation. The photolysis of water, using energy from sunlight absorbed by chlorophyll, produces gaseous oxygen, electrons, and hydrogen ions and is a key reaction in photosynthesis. See photophosphorylation; photosystems I and II.

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photolysis The breaking down of water using light; it occurs in non-cyclic photophosphorylation.

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photolysis The breakdown of water (H2O → H + OH) by electromagnetic radiation.