Which Statement Is Correct About the Michaelis-Menten Constant, K_m, for the Kinetic

Multiple Choice

Which statement is correct about the Michaelis-Menten constant, K_m, for the kinetic mechanism below?

A) It is numerically equal to the substrate concentration required to achieve one half the maximum velocity.
B) Its defined as K_m = k₁/(k−₁ + k₂) .
C) It is approximately equal to the dissociation constant for the enzyme-substrate complex to E + P.
D) The value of K_m is constant for an enzyme regardless of the specific substrate molecule used to determine it.
E) Its numeric value has the units of moles−¹.