Which of the following coenzyme is NOT directly required in any of the steps of the Kreb's cycle?

Step-by-step solution

The Krebs cycle involves a series of oxidation-reduction and substrate-level phosphorylation reactions. NAD ^+ is required as a coenzyme for the enzymes isocitrate dehydrogenase, -ketoglutarate dehydrogenase, and malate dehydrogenase. FAD is required as a coenzyme for succinate dehydrogenase. Coenzyme A (CoA) is required by the -ketoglutarate dehydrogenase complex to form succinyl-CoA. Coenzyme Q (Ubiquinone) is a mobile electron carrier in the electron transport chain (ETC) located in the inner mitochondrial membr