When substrate concentration is equal to Km value

Q. When substrate concentration is equal to Km value

A.            Half of the enzyme molecules are bound to the substrate molecules and the other half are free

B.            maximum enzyme moleules are taking part in the reaction

C.            The reaction is now at equibrillium

D.            Maximum velocity is achieved

Answer: Half of the enzyme molecules are bound to the substrate molecules and the other half are free