In the two-messenger mechanism of the action of protein hormones,the second messenger is ____ which activates specific ____ in a cell to bring about the cell's response to the hormone.
A)cyclic AMP/receptors
B)an enzyme/cyclic AMP molecules
C)cyclic AMP/enzymes
D)a receptor/enzymes

Question

Quizplus · Accepted Answer

In the two-messenger mechanism of the action of protein hormones, the first messenger is the protein hormone itself, which binds to a receptor on the cell membrane. This activates an enzyme called adenylate cyclase, which then produces cyclic AMP (cAMP) as a second messenger. cAMP then activates specific enzymes in the cell to bring about the cell's response to the hormone. Therefore, the correct choice is C: cyclic AMP/enzymes.

In the Two-Messenger Mechanism of the Action of Protein Hormones,the