A hormone binds a receptor and activates the cAMP signal transduction pathway ultimately leading to the cell response. Which of the following is NOT a likely mechanism for reversing (or shutting off) cAMP transduction?
A) The hormone dissociating from the receptor.
B) The GTP on the alpha subunit of the G protein is hydrolyzed to GDP.
C) Activate phosphodiesterase.
D) Activate adenylyl cyclase.
E) Protein phosphatases remove phosphates from proteins initially activated by protein kinase A.
Correct Answer:
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