Which of the following is 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) It would use ATP instead of GTP to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane.
E) It would employ a transduction pathway directly from an external messenger.

Question

Quizplus · Accepted Answer

GTP is necessary for the activation and inactivation of the G protein on the cytoplasmic side of the plasma membrane. Without GTP, the signaling system would not be able to regulate the activity of the G protein, which is an essential component of many signaling pathways.

Which of the Following Is True for the Signaling System