Which of the following describes a characteristic feature of an enzyme obeying Michaelis-Menten kinetics? (A) The enzyme velocity is at 1 ⁄2 the maximal rate when 100% of the enzyme molecules contain...

Which of the following describes a characteristic feature of an enzyme obeying Michaelis-Menten kinetics?

(A) The enzyme velocity is at 1

⁄2 the maximal rate when 100% of the enzyme molecules contain bound substrate.

(B) The enzyme velocity is at 1

⁄2 the maximal rate when 50% of the enzyme molecules contain bound substrate.

(C) The enzyme velocity is at its maximal rate when 50% of the enzyme molecules contain bound substrate.

(D) The enzyme velocity is at its maximal rate when all of the substrate molecules in solution are bound by the enzyme.

(E) The velocity of the reaction is independent of the concentration of enzyme.