This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
Biotin is a coenzyme for: 
Select and explain. 
A. Pyruvate dehydrogenase, B. Pyruvate carboxylase, C. PEP carboxylase, D. Glutamate pyruvate transaminase
B: Pyruvate carboxylase
Answer: B: Pyruvate carboxylase 
Explanation: Ans. B. Pyruvate carboxylaseBiotin is required as a co-enzyme of carboxylation reactions. Pyruvate carboxylase converts pyruvate to oxaloacetate.