What is the significance of the Michaelis constant in enzyme kinetics?

A It represents the maximum velocity of an enzymatic reaction
B It is a measure of the binding affinity of an enzyme for its substrate
C It is the concentration of substrate at which the reaction rate is half of the maximum velocity
D It represents the energy required for an enzymatic reaction to occur
The Michaelis constant (Km) is a measure of the binding affinity of an enzyme for its substrate, and it is defined as the concentration of substrate at which the reaction rate is half of the maximum velocity (Vmax/2).
Lehninger Principles of Biochemistry
Fundamentals of Biochemistry Biochemistry Enzyme Kinetics Medium MEDICAL Confidence: high