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

Hint: Alcoholic fermentation is also known as ethanol fermentation where biological elements such as glucose, fructose, and sucrose are converted into cellular energy and thereby produce ethanol and carbon dioxide as their by-product. It is a biochemical process occurring for the formation of alcohol, this fermentation can be done with the help of some (saccharomyces species), some yeast and bacterial genera.

Complete answer:
- Glucose, fructose and sucrose are converted into cellular strength and thereby produce ethanol and carbon dioxide as a metabolic waste product.
- During fermentation, glucose undergoes glycolysis, and yields pyruvic acid, which then transformed into acetyl CoA. Then glyceraldehyde phosphate is produced, which then transforms to acetaldehyde and this acetaldehyde transforms into ethanol.
- So, in alcohol fermentation triose phosphate is the electron donor, at the same time as acetaldehyde is the electron acceptor.
- The number one motive of alcohol fermentation is to offer energy in the shape of ATP that is used within the course of mobile sports activities, beneath anaerobic situations.
- However, from the yeast point of you, ethanol and carbon dioxide are waste products.
- Pyruvate: Pyruvate or pyruvic acid is a carboxylic acid that is used to make ethanol. 2 pyruvate molecules are shaped by breaking down one glucose molecule inside the first step. Electron vendors like NADH also are involved in this approach.
- Electron Carriers: These are the molecules liable for capturing the electrons that are launched in the course of a chemical reaction.

Hence, the correct answer is option (A).

Note: NAD is the primary electron issuer involved in alcoholic fermentation reactions. It captures the electrons at some stage in the first step of fermentation (glycolysis) and decreases to NADH. This decreased form gives electrons in the course of the conversion of pyruvate to ethanol. It uses an alcohol dehydrogenase enzyme for converting acetaldehyde to ethanol.