TLS Online TPP Program

#Question id: 2149


A ligand-gated ion channel (such as the nicotinic acetylcholine receptor) is:

#XL - S Microbiology
  1.  a charged lipid in the membrane bilayer that allows ions to pass through.

  2. a membrane protein that permits a ligand to pass through the membrane only when opened by the appropriate ion.

  3. a membrane protein that permits an ion to pass through the membrane only when opened by the appropriate ligand.

  4. a molecule that binds to the membrane thereby allowing ions to pass through.