A protein that forms an ion channel through a membrane is most likely to be
A) a peripheral protein.
B) a transmembrane protein.
C) a phospholipid.
D) an enzyme.
E) entirely outside the phospholipid bilayer.

Question

Quizplus · Accepted Answer

A transmembrane protein spans the lipid bilayer and can form channels through which ions can pass. Peripheral proteins are not embedded in the membrane and are unlikely to form ion channels. Phospholipids are not proteins and cannot form ion channels. Enzymes are also unlikely to form ion channels. Being entirely outside the phospholipid bilayer is also unlikely to allow for the formation of an ion channel.

A Protein That Forms an Ion Channel Through a Membrane