Plant cell suspension cultures produce all the metabolites, primary and secondary, produced by the parent plant from which the cultures are derived. It has been conclusively established that the production of secondary metabolites is controlled by genes and the synthesis of almost all the secondary metabolites is a several enzymatic step reaction. Production of secondary metabolites in culture is generally low and does not meet the prerequisites for an industrial level production process. Therefore, our understanding about the production of a compound should be clearer and more thorough to exploit it at the commercial level.