Evaluate the importance of the conformational change in the beta adrenergic GPCR for the overall signaling pathway.

• A. The conformational change inhibits the dissociation of the G protein alpha subunit.
• B. The conformational change directly converts ATP to cyclic AMP.
• C. The conformational change terminates the signaling pathway.
• D. The conformational change is crucial as it initiates the activation of the G protein, leading to downstream signaling events.

Answer: (D)