A cell is mutated so that adenylyl cyclase is inactive. What would be the most likely result of this experiment?
Cyclic AMP is overexpressed and the secondary signal is not able to be turned off.
Cyclic AMP is no longer able to serve as a secondary signal.
IP3 is overexpressed and the secondary signal is not able to be turned off.
IP3 is no longer able to serve as a secondary signal.