Choose the correct answer from the list below. Not all of the answers will be used.
-An enzyme's affinity for its substrate is measured by the _______________ constant.

A)first-order reaction
B)second-order reaction
C)metabolism
D)ensemble
E)biomolecular
F)turnover number
G)Michaelis-Menten
H)equilibrium
I)bsequential
J)kinetics
K)initial velocity
L)allosteric
M)ping-pong