And those instantaneous dipole moments will interact with one another via the London dispersion forces. So not only do we have hydrogen bonding between the complementary adjacent bases, but we have the Vanderbilt forces, these London dispersion forces, between our bases stacked on top of one another. So these are H bonds, but these Brown bonds are essentially our London forces, the London Dispersion forces. So we have these two important types of intermolecular bonds that play a role in forming our DNA double helix. Now not only that, but because the bases are essentially non polar, notice what happened. So the entire DNA molecule is swimming around in the solvent, in water, inside the nucleus of the cell.