Rhodopsin,a Light-Sensitive GPCR Whose Role in Vision Is Dependent on Its

Multiple Choice

Rhodopsin,a light-sensitive GPCR whose role in vision is dependent on its phosphorylation status,is influenced in part by the protein arrestin.Which of the following is TRUE with regard to rhodopsin and vision?

A) Rhodopsin phosphatase increases the degree of rhodopsin phosphorylation.
B) Arrestin binds to the completely phosphorylated opsin to inhibit signaling.
C) Rhodopsin activation promotes the opening of a cGMP-gated ion channel.
D) none of the above