Question

In glycolysis, during oxidation electrons are removed by

• A. glyceraldehyde 3-phosphate
• B. NAD+
• C. Molecular oxygen
• D. ATP

Answer 1

The correct option is B

NAD+

The correct option is B

Explanation of correct option:

1. Glycolysis is the process in which energy is produced by the breakdown of glucose.
2. NAD+ is considered to be the electron carrier in glycolysis which can be transformed to NADH by adding a proton.
3. It is formed as a result of the oxidation of carbohydrates and fats.

Explanation of incorrect options:

Option A

1. It is converted to glycerate 1,3-biphosphate by the catalysis of the enzyme glyceraldehyde 3-phosphate dehydrogenase.
2. Glyceraldehyde 3-phosphate helps in the extraction of electrons which will be picked up by electron carriers(NAD+).

Option C

1. Molecular oxygen has no role in glycolysis since it is an anaerobic process.

Option D

1. 4 ATP(Adenosine triphosphate) molecules are obtained from 1 glucose during glycolysis.
2. Out of the 4 ATP molecules, 2 ATP molecules are utilized and the remaining 2 ATP molecules are considered as a net gain.

Final answer: In glycolysis, during oxidation electrons are removed by NAD+.