biochem ferment

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Last updated 9:42 PM on 7/24/26
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5 Terms

1
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The single purpose of fermentation

Regenerate NAD⁺ so glycolysis can continue. It produces no additional ATP.

2
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Why the cell tolerates the "waste" of lactate/ethanol

Speed. Anaerobic glycolysis makes ATP far faster than oxidative phosphorylation, which matters in bursts of activity or O₂-poor tissue

3
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Enzyme + cofactor: pyruvate → lactate

Lactate dehydrogenase; oxidises NADH → NAD⁺

4
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Two enzymes + cofactor: pyruvate → ethanol (yeast)

Pyruvate decarboxylase (TPP) → acetaldehyde; alcohol dehydrogenase → ethanol (reoxidises NADH)

5
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Why lactate is not a dead end for the whole body

Cori cycle: lactate → liver → gluconeogenesis → glucose returned to muscle