How Would the Signal of a G Protein-Coupled Receptor, Without

question 47

Multiple Choice

How would the signal of a G protein-coupled receptor, without ligand, be affected if you made a G protein that converted GDP to GTP on its own without needing to be activated by the G protein-coupled receptor?

• A)The signal wouldn't be affected; there is no ligand, thus no signal.
• B)The signal wouldn't be affected; the ligand would be unable to bind due to the conformational change.
• C)The G protein would be active but unable to signal due to the lack of ligand.
• D)The G protein would be active and signaling, despite the lack of ligand.

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