Elements of carbon chemistry: hydrocarbons and hybridization of carbon, functional groups with particular reference to simple and complex oxygen functions. Alcohols, Carbonyls and carboxiles. The alpha and beta cheto acids, alpha and beta oxiacid. The reaction of reduction of pyruvic acid to lactic acid. Carboxylic acids and derivatives.Biomolecules: structure and classification of carbohydrates, lipids, proteins and nucleic acids.