How do phospholipids interact with water molecules?

The polar heads interact with water, the nonpolar tails do not. A double - stranded DNA molecule that contains 30% guanine.

are referred to as hydrophobic, face the interior of the bilayer, where they are shielded from water. On the other hand, the polar regions of the molecules, termed hydrophilic, face outward where they interact with the water inside and outside of the cell.