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 and inactivate the g protein 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 and inactivate the g protein on the cytoplasmic side of the plasma membrane. d.)it would employ a transduction pathway directly from an external messenger.