Question

In alcohol 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

The correct option is A Triose phosphate is the electron donor while acetaldehyde is the electron acceptor

Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, into cellular energy, producing ethanol and carbon dioxide as a byproduct.
This process occurs in two stages:
- First, the glucose is converted into pyruvate with the generation of ATP and NADH.
- Next, the obtained pyruvate is converted into ethanol and carbon dioxide, with the consumption of NADH generate during glycolysis.

During glycolysis, triose phosphate acts as an electron donor during the conversion of glucose to pyruvate.
During the next stage, 2-acetaldehyde, formed from decarboxylation of pyruvate, accepts electrons from NADH and is reduced to ethanol.
Hence the correct option is, triose phosphate is the electron donor while acetaldehyde is the electron acceptor.