Choose the Correct Answer from the List Below

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