Cellular Respiration

AP Biology· difficulty 2/5

A student measures CO2 production by yeast fermenting glucose vs a no-glucose control.

The CO2 produced in the experimental tube originates from which step?

A
$Hydrolysis of ATP$
B
$Decarboxylation of pyruvate to acetaldehyde during alcoholic fermentation$
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C
$Oxidation of glucose in glycolysis$
D
$Reduction of NAD+ to NADH$

Explanation

In alcoholic fermentation, pyruvate decarboxylase removes CO2 from pyruvate to form acetaldehyde, which is then reduced to ethanol by NADH.

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