Exhibit 6A This Is a Reaction Going on in Your

Multiple Choice

Exhibit 6A This is a reaction going on in your muscle cells right this very minute: The enzyme triose phosphate isomerase catalyzes this reaction in the forward direction as part of the glycolytic pathway. It follows simple Michaelis-Menten kinetics:
Typical cellular concentrations: triose phosphate isomerase = 0.1 nM
Dihydroxyacetone phosphate = 5 µM glyceraldehyde-3-phosphate = 2 µM
Refer to Exhibit 6A. What is the K_M of the enzyme?

A) 10 nM
B) 0.1 µM
C) 1 µM
D) 10 µM