Alcohol dehydrogenase and aldehyde dehydrogenase are​

A) ​enzymes involved in the metabolism of alcohol.
B) ​toxic byproducts of excessive alcohol consumption.
C) ​found in fermented but not distilled alcoholic beverages.
D) ​biological markers differentiating alcoholics from nonalcoholics.

Alcohol Dehydrogenase

A liver enzyme that metabolizes alcohol into aldehyde.

Aldehyde Dehydrogenase

An enzyme that converts aldehyde to acetic acid.

Metabolism

The chemical processes that occur within a living organism in order to maintain life, involving the conversion of food to energy, elimination of nitrogenous wastes, and the synthesis of necessary compounds.