One extracellular messenger molecule can ultimately influence the activity of only one protein molecule within the cell.

Question

Quizplus · Accepted Answer

This statement is false. One extracellular messenger molecule can ultimately influence multiple protein molecules within the cell. This is because one messenger molecule can initiate a signaling cascade, which can activate or inhibit multiple protein molecules at different levels of the cascade. Additionally, some signaling molecules can also bind to multiple receptors on the cell surface, leading to different downstream effects.

One Extracellular Messenger Molecule Can Ultimately Influence the Activity of Only