So this is a water molecule, this is a water molecule and so forth. Now this is the oxygen and these are the age groups. So we know that the age groups, because of the polarity of water, the age groups will be partially positive and our oxygen groups will be partially negative. So what that means is these polar water molecules will orient themselves in such a way as to interact with the phosphate groups that are pointing to the outside on the double helix DNA molecule and that will be a stabilizing interaction. So once again we see that not only do we have hydrogen bonds that exist between the bases, but we also have these hydrogen bonds that exist between our water molecules and these phosphate groups. And that will be a very stabilizing effect.