If an animal cell suddenly lost the ability to produce GTP, what might happen to its signaling system?
A) It would not be able to activate G proteins on the cytoplasmic side of the plasma membrane.
B) It would be able to carry out reception and transduction but would not be able to respond to a signal.
C) It would use ATP instead of GTP to activate G proteins on the cytoplasmic side of the plasma membrane.
D) It would not be able to activate receptor tyrosine kinases.

Question

Quizplus · Accepted Answer

G proteins rely on GTP for their activation, so if a cell loses the ability to produce GTP, it would not be able to activate G proteins on the cytoplasmic side of the plasma membrane. This would impair the signaling system of the cell.

If an Animal Cell Suddenly Lost the Ability to Produce