What Happens Immediately After a Signaling Molecule Binds to Its

question 25

Multiple Choice

What happens immediately after a signaling molecule binds to its G-protein coupled receptor (GPCR) ?

• A)The signaling molecule enters the cell through its GPCR and travels to the nucleus,where it acts as a transcription factor.
• B)The G protein exchanges GTP for GDP,and becomes inactivated.
• C)The G protein exchanges GDP for GTP,and becomes inactivated.
• D)The G protein exchanges GTP for GDP,and becomes activateD.
• E)The G protein exchanges GDP for GTP,and becomes activated.