Question

Pyruvate decarboxylase is an enzyme used during

• A. Alcoholic fermentation
• B. Lactic acid fermentation
• C. Oxidative decarboxylation
• D. Krebs cycle

Answer 1

The correct option is A Alcoholic fermentation

It is used during the conversion of pyruvate into acetaldehyde in certain organisms such as yeast. The acetaldehyde is then reduced to ethanol. This is called alcoholic fermentation.
In lactic acid fermentation, pyruvate is converted to lactic acid. Oxidative decarboxylation is a process which converts pyruvate into acetyl CoA. This is the first step after glycolysis in aerobic respiration.