Assess the potential impact of a drug that enhances effector enzyme activity in GPCR pathways.

• A. Enhanced effector enzyme activity would inhibit ligand binding to GPCRs.
• B. Enhanced effector enzyme activity would decrease secondary messenger production, dampening cellular responses.
• C. Enhanced effector enzyme activity would have no effect on secondary messenger production.
• D. Enhanced effector enzyme activity would increase secondary messenger production, potentially amplifying cellular responses.

Answer: (D)