Question

The enzyme involved in alcoholic fermentation is

• A. Pyruvate decarboxylase.
• B. Alcohol dehydrogenase.
• C. Lactate dehydrogenase.
  
• D. Both A and B.

Answer 1

The correct option is D Both A and B.

Fermentation is a general term for the anaerobic degradation of glucose or other organic nutrients to obtain energy, conserved as ATP because living organisms first arose in an atmosphere without oxygen, anaerobic breakdown of glucose is probably the most ancient biological mechanism for obtaining energy from organic fuel molecules. The glucose is broken down into pyruvic acid. The pyruvic acid may undergo alcohol fermentation or lactic acid fermentation during anaerobic respiration. In alcohol fermentation, pyruvate is converted to acetaldehyde by the action of pyruvate decarboxylase. The acetaldehyde is converted to ethanol by alcohol dehydrogenase.

So, the correct answer is option D.