Activation of a receptor by a chemical messenger
A) Occurs when the messenger binds to the ligand-binding site of the receptor
B) Is the first step leading to the ultimate response of a cell to the messenger
C) Requires a change in receptor conformation
D) Both occurs when the messenger binds to the ligand-binding site of the receptor and is the first step leading to the ultimate response of a cell to the messenger are correct
E) All of the choices are correct
Correct Answer:
Verified
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