Which of the following enzymes, requires Biotin as the coenzyme?: (A) Pyruvate Dehydrogenase, (B) Pyruvate Kinase, (C) Pyruvate Carboxylase, (D) PEP Carboxy Kinase
Answer is C. Biotin is a coenzyme in carboxylation reactions, in which it serves as a carrier of activated carbon dioxide.