And either one of these will basically break all these hydrogen bonds holding our two strands of DNA together. Eventually we dissociate our DNA helix and we form these two individual strands of DNA. So this is basically the backbone that consists of the phosphate and sugar groups and these color structures are our bases. 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.