Hacker: Due to the composition of the cell membrane, some molecules can cross the membrane more easily than others. This is called relative permeability. Which type of molecule is least able to cross the membrane without transporters? There is a poster in this room that will help you, or you can click "View Image" in the LabPad.
a) Large uncharged polar molecules
b) Small uncharged polar molecules
c) Ions
d) Small hydrophobic molecules