Wednesday, 9 October 2013

Biological Molecules

Biological molecules


  • Carbohydrates contain carbon, hydrogen and oxygen.
  • Their structure involves monosaccharides such as glucose and fructose which can form long chain polysaccharides such as starch or cellulose in condensation reactions (removal of water in reaction).


  • Proteins contain carbon, hydrogen, oxygen and nitrogen.
  • They are made up of long chains of amino acids, which join together in a variety of orders.


  • Lipids contain carbon, hydrogen and oxygen.
  • They are composed of monomers of lipids, which contain fatty acids and glycerol
  • They form in condensation reactions, and can be broken down into their subunits in hydrolysis reactions.