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What is Fermentation?

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the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat.
User Maxim Makhun
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Fermentation is a metabolic process that changes sugar to acids, gases, or alcohol. It happens in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
User Sebastian Vischer
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