One of the major categories of receptors in the plasma membrane reacts by forming dimers, adding phosphate groups, and then activating relay proteins. Which type does this?
A) G protein-coupled receptors
B) ligand-gated ion channels
C) steroid receptors
D) receptor tyrosine kinases

Question

Quizplus · Accepted Answer

Receptor tyrosine kinases (RTKs) form dimers upon binding a ligand, which leads to autophosphorylation of specific tyrosine residues in the cytoplasmic domains of the receptor. The phosphorylated tyrosines provide docking sites for specific signaling molecules called relay proteins which can activate a signaling cascade.

One of the Major Categories of Receptors in the Plasma