A non-substrate molecule binds to an enzyme. Now the enzyme is able to bind its substrate when it previously could not. What has likely occurred?
A - An activator is bound to the substrate
B - A competitive inhibitor is bound to the enzyme
C - The active site has changed shape
D - The reaction has been negatively regulated
E - A noncompetitive inhibitor is bound to the enzyme
Answer: C - The active site has changed shape