In the process of cell respiration,the vitamins niacin and riboflavin are both necessary for which stage?
A)glycolysis
B)the Krebs cycle
C)the cytochrome transport system
D)all three stages

Question

Quizplus · Accepted Answer

Niacin and riboflavin are coenzymes that are necessary for the reactions that occur in the Krebs cycle, also known as the citric acid cycle. Specifically, niacin is a component of the coenzyme NAD+ (nicotinamide adenine dinucleotide), which is important for the oxidation of pyruvate and the production of ATP in the Krebs cycle. Riboflavin is a component of the coenzyme FAD (flavin adenine dinucleotide), which is also involved in the Krebs cycle reactions. While these vitamins may have roles in other stages of cell respiration, their importance in the Krebs cycle is crucial.

In the Process of Cell Respiration,the Vitamins Niacin and Riboflavin