Question

In alcoholic fermentation

• A. Triose phosphate is the electron donor while acetaldehyde is the electron acceptor
• B. Triose phosphate is the electron donor while pyruvic acid is the electron acceptor
• C. There is no electron donor
• D. Oxygen is the electron acceptor

Answer 1

Answer: (A)

When oxygen is not available (anaerobic condition) yeast and some other microbes convert pyruvic acid into ethyl alcohol. It is a two step process. In the first step pyruvic acid is decarboxylated to yield acetaldehyde and CO₂.Pyruvic acid is a 3-C compound and acts as electron donor while acetaldehyde is the electron acceptor.