enzymes often play a major role in signal transduction pathways. for example, enzymes can help convert an extracellular signal into an intracellular response. specifically, adenylyl cyclase is an enzyme that catalyzes the conversion of atp to cyclic amp (camp). one competitive inhibitor of adenylyl cyclase is called mant-itp. which of the following questions would best direct an investigation on how mant-itp impacts a signal transduction pathway?