Nucleic acids (DNA and RNA) are the next group of macromolecules that we are looking at. Nucleic acids are made up of monomer units that consist of a phosphate group, a sugar unit and a nitrogenous base. The nitrogenous bases in DNA are Thymine (T), Adenine (A), Guanine(G) and Cytosine (C). In RNA, the Thymine (T) is replaced by Uracil (U). Thymine (or Uracil in RNA) always pairs with Adenine (2 hydrogen bonds) and Guanine always pairs with Cytosine (3 hydrogen bonds).
- Nucleic acids from Pearson
- DNA structure from iBiology
- YouTube video – Macromolecules – Nucleic acids (DNA and RNA)