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Fermentation is a process that typically occurs in yeast cells, muscle cells, and some bacteria in the absence of oxygen.

By David Carmack (Own work) [CC BY-SA 3.0 (], via Wikimedia Commons

What is the main function of fermentation?


Regenerate NAD$^+$ so that glycolysis can continue.


Produce a large amount of ATP to fuel chemical reactions.


Convert glucose to carbon dioxide and water.


Produce the electron carriers NADH and FADH$_2$.

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