Which of the following is true during a typical cAMP- type signal transduction event?

Question

Quizplus · Accepted Answer

During a typical cAMP-type signal transduction event, the hormone first binds to a receptor on the cell membrane, which activates a G protein. The activated G protein then activates adenylyl cyclase, which produces cAMP as the second messenger. The cAMP then activates protein kinase A (PKA), which leads to the phosphorylation of target proteins and ultimately produces the cellular response. Therefore, option C is true as adenylyl cyclase is activated after the hormone binds to the cell and before phosphorylation occurs. Option A is incorrect as the hormone does not directly bind to the second messenger. Option B is incorrect as the second messenger (cAMP) is actually one of the earliest parts of the system to be activated. Option D is incorrect as the second messenger does not attract more hormones to the cell.

Which of the Following Is True During a Typical CAMP-