<prompt> Biotin is a coenzyme for:Pyruvate dehydrogenasePyruvate carboxylasePEP carboxylaseGlutamate pyruvate transaminase  <response>: Ans. B. Pyruvate carboxylaseBiotin is required as a co-enzyme of carboxylation reactions. Pyruvate carboxylase converts pyruvate to oxaloacetate. 