You recently identified a molecule that you believe is a primary messenger for a signal transduction mechanism.All you know about this ligand is that it is hydrophilic.Where would you expect to find initial interaction of the molecule with its receptor?
A)on the outer surface of the plasma membrane
B)within the cytoplasm of the cell
C)within the nucleus of the cell
D)on the cytoplasmic side of the plasma membrane
E)in endosome vesicles

Question

Quizplus · Accepted Answer

Hydrophilic molecules cannot easily cross the lipid bilayer of the plasma membrane, so they typically bind to receptors located on the outer surface of the plasma membrane to initiate signal transduction.

You Recently Identified a Molecule That You Believe Is a Primary