Pyruvate generated by glycolysis under anaerobic conditions is converted to lactate or ethanol. It may seem this is a waste of energy, but it is in fact critical to survival for cells exposed to oxygen limiting conditions. Explain why this is true.

Biochemistry
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Chapter1: Biochemistry: An Evolving Science
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 Pyruvate generated by glycolysis under anaerobic conditions is converted to
lactate or ethanol. It may seem this is a waste of energy, but it is in fact
critical to survival for cells exposed to oxygen limiting conditions. Explain why
this is true.

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