<prompt> Vitamin which is not required in the TCA cycle?PyridoxineNiacinPantotheic acidRiboflavin  <response>: Vitamins, in the form of their respective coenzymes, are required for proper functioning of the TCA cycle. vitamins needed in the TCA cycle are: Thiamine as TPP Riboflavin as FAD and FMN Niacin as NAD and NADH Pantothenic acid as a pa of Coenzyme A Reference: Harpers illustrated biochemistry 30th edition 