Which Statement About G Proteins Is True

question 65

Multiple Choice

Which statement about G proteins is true?

• A) G proteins contain only one important binding site.
• B) When a G protein binds to an activated receptor protein,ADP is exchanged for ATP.
• C) G protein-linked receptors are transmembrane proteins.
• D) G proteins usually float free in the cytoplasm.
• E) G proteins signal only the cell from which they are secreted.

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