Cellular Respiration

AP Biology· difficulty 4/5

In yeast under anaerobic conditions, pyruvate is converted to

A
$Ethanol and CO₂ via alcoholic fermentation$
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B
$Lactic acid via homolactic fermentation$
C
$Glucose through gluconeogenesis$
D
$Acetyl-CoA for the Krebs cycle$

Explanation

Yeast: pyruvate \to acetaldehyde + CO₂ \to ethanol (regenerates NAD⁺ for glycolysis). Animal muscle uses lactate fermentation under anaerobic conditions.

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