Answer:
c. A signal molecule binds to the receptor activating it.
d. The G Protein is activated by the dissociation of GDP and binding of GTP
a. The G protein dissociates from the receptor
b. The G protein activates an effector protein, leading to a cellular response.
e. The receptor changes conformation and binds an inactive G Protein.
Explanation:
G-protein receptors are plasma membrane receptors that are coupled with G-protein (guanine nucleotide-binding protein). After the signal binds for the receptor, receptor changes its conformation shape which results in the activation of G protein (GDP is changed with GTP). dissociated subunits of G protein can activate effector proteins (enzymes, ion channels etc) which leads to cell response. Hydrolysis of GTP to GDP inactivates the cascade.
