An Enzyme Has a Total of Four Active Sites

question 52

Multiple Choice

An enzyme has a total of four active sites. When you denature the molecule 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 regulation.
• B) The enzyme requires a cofactor to function normally.
• C) The protein's structure is affected by temperature and pH.
• D) The protein has quaternary structure.

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Definitions:

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A major neurotransmitter in the brain involved in learning, memory, and the regulation of the nervous system's activity.