Question

what molecules will pass through a cell membrane most easily? multiple choice small polar molecules small nonpolar molecules large polar molecules large nonpolar molecules large neutral molecules

Explanation:

Cell membranes are composed of a phospholipid - bilayer with a non - polar interior. Small nonpolar molecules can dissolve in the nonpolar region of the lipid bilayer and pass through easily. Polar molecules are repelled by the non - polar interior, and large molecules have a harder time diffusing through due to their size.

Answer:

B. small nonpolar molecules