Two Different Subtypes of Matrix Metalloproteinase, Enzymes MMP-2 and MMP-9

Multiple Choice

Two different subtypes of matrix metalloproteinase, enzymes MMP-2 and MMP-9, are released from a squamous cell carcinoma.The enzymes behave according to Michaelis-Menten kinetics by the measured parameters in the table, in the same substrate:
Оn the basis of these data, which of the following is a true statement?

A) MMP-2 makes more product than MMP-9 at the same enzyme concentrations.
B) MMP-2 is more stable to proteolytic degradation than MMP-9.
C) MMP-2 is denatured in the extracellular environment faster than MMP-9.
D) MMP-2 is more active at its maximal velocity than MMP-9.
E) MMP-2 reaches half-maximal velocity at a higher substrate concentration than does MMP-9.