Select the statement that best described a key difference between competitive and noncompetitive inhibitors.
A) A competitive inhibitor binds to the active site and a noncompetitive inhibitor does not.
B) A noncompetitive inhibitor binds to the active site and a competitive inhibitor does not.
C) A competitive inhibitor is more effective than a noncompetitive inhibitor.
D) A noncompetitive inhibitor is more effective than a competitive inhibitor.
E) A noncompetitive inhibitor has structural similarities to the enzyme's active site and the competitive inhibitor does not.

Question

Quizplus · Accepted Answer

In competitive inhibition, the inhibitor competes with the substrate for binding to the active site of the enzyme. In contrast, noncompetitive inhibition occurs when the inhibitor binds to a different site on the enzyme that is not the active site, resulting in a change in the shape or activity of the enzyme. Therefore, the key difference between competitive and noncompetitive inhibitors is that a competitive inhibitor binds to the active site whereas a noncompetitive inhibitor does not.

Select the Statement That Best Described a Key Difference Between