Refer to the Figure Below

Multiple Choice

Refer to the figure below. The figure shows a protein receptor that functions in a signal transduction pathway.This receptor binds a ligand and then later binds an antagonist molecule.How do sections of the receptor shown in the figure change in response to the binding of each molecule?

A) Section B, but not section C, undergoes a conformational change in response to the ligand and to the antagonist molecule.
B) Section C, but not section B, undergoes conformational change in response to the ligand and to the antagonist molecule.
C) Both sections C and B undergo conformational change in response to the ligand and to the antagonist molecule.
D) Both sections C and B undergo conformational change in response to the ligand but not to the antagonist molecule.
E) Both sections C and B undergo conformational change in response to the antagonist molecule but not to the ligand.