Identify the incorrect statement.

Moderate

A

In the second step of alcohol fermentation, acetaldehyde is oxidised by NADH to ethanol
B

Electron transport chain is operated in aerobic respiration but not in fermentation.
C

The two types of usual fermentations are alcohol fermentation and lactic acid fermentation.
D

Excess lactate is gradually carried away by the blood to the liver, where it is converted back to pyruvate by liver cells.

Solution

In the second step of alcohol fermentation, acetaldehyde is reduced by NADH to ethanol. This regenerates the supply of NAD⁺ needed for the continuation of glycolysis.

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