The Step Immediately Following the Binding of Aligand to a G

Multiple Choice

The step immediately following the binding of aligand to a G -protein coupled receptor is

A) Dissociation of the a subunit from the $\beta$ and Ƴ subunit
B) Activation of some protein by the a subunit
C) Exchange of GTP for GDP on the a subunit
D) Hydrolysis of GTP by the a subunit
E) Exchange of GTP for GDP on the $\beta$ Ƴ subunit