Amino acids (HT only)


  • Amino acids have two different functional groups in a molecule. Amino acids react by condensation polymerisation to produce polypeptides.

For example: glycine is H2NCH2COOH and polymerises to produce the polypeptide

(-HNCH2COO-)n and n H2O

Different amino acids can be combined in the same chain to produce proteins.



Key opportunities for skills development

Mixtures can be separated by physical processes such as

filtration, crystallisation, simple distillation, fractional distillation and chromatography. These physical processes do not involve chemical reactions and no new substances are made.

Students should be able to:

  • describe, explain and give examples of the specified processes of separation
  • suggest suitable separation and purification techniques for mixtures when given appropriate information.