Long answer plans

• There are 20 types of amino acids
• 2 or more AA =dipeptide
• AA bonded by peptide bonds via condensation reactions
• primary structure= sequence of AA
• Secondary structure= Hydrogen bonds folding equalling alpha helix or beta sheet
• Tertiary structure= 3D specific shape involved by hydrogen bonds, ionic bonds and disulfide bonds
• Quaternary= 2 or more polypeptide chains