Which Molecules Will Pass Most Easily Through a Cell Membrane

Question

Which molecules will pass most easily through a cell membrane by diffusion?
A) large, hydrophilic molecules
B) large, polar molecules
C) small, hydrophobic molecules
D) ionic molecules

Accepted Answer

Small, hydrophobic molecules pass most easily through a cell membrane by diffusion because the lipid bilayer of the cell membrane is hydrophobic, allowing these molecules to pass through without the need for transport proteins.