What role does biotin play in pyruvate carboxylase during gluconeogenesis?

• A. Biotin inhibits the activity of pyruvate carboxylase.
• B. Biotin acts as a prosthetic group, facilitating the carboxylation of pyruvate.
• C. Biotin serves as a substrate for pyruvate carboxylase.
• D. Biotin is not involved in the function of pyruvate carboxylase.

Answer: (B)