The Biology Project > Cell Biology > Cell Signaling > Problem Set

Cell Signaling Problem Set

Problem 1: Receptors

A protein receptor binds a hormone outside the cell membrane and activates a protein kinase inside the cell. Is the receptor a peripheral or integral membrane protein?

A.	Membrane receptors are peripheral, or associated with the surface of the bilayer. Association with a hormone results in the release of a lipid signal that activates protein kinases.
B.	Membrane receptors associated with signaling are all integral membrane proteins that can transmit signals through the lipid bilayer.

The Biology Project > Cell Biology > Cell Signaling > Problem Set