Chemosythesis involves inorganic chemicals therefore, light photons are not required during chemosynthesis.
Chemosynthesis refers to the process by which some organism obtain food from inorganic chemicals rather than from light. There are many chemosynthetic bacteria that obtain food by the metabolism of methane, hydrogen sulfide or carbon dioxide.
Light photons are not required for chemosynthesis. It is only necessary during photosynthesis.
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