And so in this structure, this is the double helix where these are the H bonds holding our double helix together. And when we either increase the temperature or change the PH we essentially disrupt and break these hydrogen bonds. And so we essentially dissociate our DNA molecule. Now, the breaking of the hydrogen bonds and the subsequent dissociation of that DNA molecule is known as melting. So DNA melting essentially refers to breaking these bonds and associating that DNA molecule. Now, the process of melting takes place abruptly at a very specific temperature and this temperature is known as the melting temperature of the DNA.