DNA or Deoxyribonucleic acid is made up of five things, Oxygen, Hydrogen, Nitrogen, Carbon, and Phosphorus. The two DNA strands are known as polynucleotides. If you stretch DNA, it'll go on forever! The inner colored lines are made of four things, Adenine, Thymine, Guanine, and Cytosine. DNA plays an important role in the functioning, growth, and reproduction of all known organisms and many viruses. In conclusion, DNA is a very important molecule.