There are various permanent hair straightening systems out there, but they generally use the same chemical process to alter the hairâs structure. An alkaline chemical solution is first applied to the hair, and this breaks down the many disulfide bonds within the hair that cause it to kink and curl.ons. 1  As the name suggests, this technique relaxes hair rather then leaving it poker straight, so if you want absolute stick straight and frizz-free hair, this method may not be for you. 2  As with every chemical process, the ever present risk of damage is there.
But they all consist of 4 nucleotides 2 made of purine bases which are adenine and guanine and 2 pyrimidine bases which are thymine and cytosine. The purine based nucleotides always pair with their base pair pyrimidine based nucleotide.In DNA Adenine is paired with thymine and guanine pairs with cytosine.But if it's RNA there is a special exception which replaces thymine with Uracil pairing with adenine.he purine based nucleotides always pair with their base pair pyrimidine based nucleotide. In DNA Adenine is paired with thymine and guanine pairs with cytosine.
  A nucleotide is made of 3 parts: Sugar, Phosphate group and Base RNA and DNA have different sugars and different bases.1. Sugar DNA-Deoxyribonucleic acid has â¦ the sugar deoxyribose RNA-Ribonucleic acid has the sugar ribose In RNA, the sugar has an extra oxygen.In DNA, the oxygen is not there. 2.here are a number of differences between DNA nucleotide and RNA  nucleotide. The main difference is that RNA molecule has one strand  while DNA is double-stranded.