Question

Some enzymatic receptors and most G-protein-coupled receptors carry the signal molecule's message into the target cell by utilizing other substances within the cytoplasm commonly called ________?

1) ligands
2) second messengers
3) ion channels
4) enzymes

Answer 1

G-protein-coupled receptors and enzymatic receptors utilize second messengers to transmit the signal molecule's message into the target cell. Hence the correct answer is option 2

Step-by-step explanation:

G-protein-coupled receptors, as well as some enzymatic receptors, transmit the signal molecule's message into the target cell by utilizing second messengers within the cytoplasm. Second messengers are small, non-protein molecules that propagate a signal within the cell after activation of the receptor. They help to spread the signal through the cytoplasm by altering the behavior of certain cellular proteins.

Hence the correct answer is option 2