What role do receptor sites play in drug activity?
A. The receptor site is the location that a drug binds to, altering the function of a biomolecule.
B. The receptor site removes a drug from the blood stream, which limits negative side effects
C. The receptor site is the same as the active site in an enzyme.
D. The receptor site is unrelated to drug activity.
E. none of the above
Answer: A
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