Proteins are polymers made up of many monomers. The monomers in proteins are amino acids. Amino Acids contain the elements:

Carbon, Hydrogen, Nitrogen and Oxygen.




When two amino acids join together in they form a peptide bond.

This reaction is known as a condensation reaction as it produces water.




Proteins have four levels of structure:


⇒ Primary – sequence of amino acids in polymer


⇒Secondary – interaction between the R groups of the amino acids leads


⇒Tertiary – more folding of α helix or β pleated due to H/Ionic/Disulphide bonds.


⇒Quaternany – two or more polypeptides joined together.