Which of the Following Statements About a G Protein Signaling

Multiple Choice

Which of the following statements about a G protein signaling pathway is true?

A) A G protein-coupled receptor bound to GTP is in its active state.
B) A G protein bound to GTP is in its active state.
C) A G protein bound to GDP is in its active state.
D) Hydrolysis of bound GTP by a G protein activates the G protein.