Which of the following signal molecules would most likely have a cytoplasmic receptor?
A) A highly charged small molecule
B) A polypeptide
C) A small nonpolar molecule
D) A phospholipid
E) A polynucleotide

Question

Quizplus · Accepted Answer

A small nonpolar molecule is the only option that can diffuse across the cell membrane and interact with a cytoplasmic receptor to initiate a signal transduction pathway. Highly charged small molecules, polypeptides, phospholipids, and polynucleotides would either require membrane-bound receptors or nuclear receptors to initiate a response.

Which of the Following Signal Molecules Would Most Likely Have