You Have Discovered an Enzyme That Has Three Active Sites

Multiple Choice

You have discovered an enzyme that has three active sites. When you denature the enzyme and study its composition, you find that each active site occurs on a different polypeptide. Which of the following hypotheses does this observation support?

A) The enzyme is subject to allosteric regulation.
B) The enzyme requires a cofactor to function normally.
C) The structure of the enzyme is affected by temperature and pH.
D) The enzyme has quaternary structure.