What kinds of molecules pass through a cell membrane most easily?
A) large and hydrophobic
B) small and hydrophobic
C) large polar
D) small and ionic

Question

Quizplus · Accepted Answer

Small and hydrophobic molecules are nonpolar and can easily pass through the hydrophobic core of the cell membrane.

Answer: D 
 Small and ionic molecules can pass through the membrane via ion channels, which provide a pathway for charged particles to move across the membrane. Large polar molecules are generally unable to pass through the lipid bilayer and require specific transport proteins. Large hydrophobic molecules are also unable to easily pass through the membrane.

What Kinds of Molecules Pass Through a Cell Membrane Most