Because the interior of the lipid bilayer contains the nonpolar , only small nonpolar substances are able to diffuse directly across the cell membrane.

Because the interior of the lipid bilayer contains the nonpolar molecules, only small nonpolar substances are able to diffuse directly across the cell membrane

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).