And so when these single strand molecules approach one another, these hydrogen bonds that are formed, that is a stabilizing effect. Now what about the second type of interaction, the London Dispersion forces. So notice that these base pairs are essentially parallel with respect to one another. So they lie along the same exact plane. So they're essentially stacked on top of one another. Now remember, when they are stacked on top of one another, there are instantaneous dipole moments that exist within our bases.