Question

question 11
what kinds of molecules pass through a cell membrane most easily?
ionic
large and hydrophobic
large polar
small and hydrophobic

Explanation:

Cell membranes are made of a phospholipid bilayer. The interior of the bilayer is hydrophobic. Small and hydrophobic molecules can dissolve in the lipid bilayer and pass through easily. Ionic molecules are charged and polar, and the hydrophobic interior of the membrane repels them. Large polar and large hydrophobic molecules (if large) have more difficulty passing through due to size or polarity - related issues.

Answer:

small and hydrophobic