What would be true for the signaling system in an animal cell that lacks the ability to produce GTP?
A) It would not be able to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane.
B) It could activate only the epinephrine system.
C) It would be able to carry out reception and transduction, but would not be able to respond to a signal.
D) Only A and C are true.
E) A, B, and C are true.
Answer: A