Which B-vitamin is a component of the carboxylase enzymes involved in the TCA cycle?

Question

Quizplus · Accepted Answer

Biotin is a component of the carboxylase enzymes involved in the TCA cycle, specifically pyruvate carboxylase, which converts pyruvate to oxaloacetate, and 2-oxoglutarate carboxylase, which converts 2-oxoglutarate to isocitrate. Thiamin (B1) is involved in the decarboxylation of pyruvate to acetyl-CoA, but not directly in the TCA cycle. Niacin (B3) and riboflavin (B2) are involved in electron transport chain reactions that generate ATP, but not directly in the TCA cycle.

Which B-Vitamin Is a Component of the Carboxylase Enzymes Involved