The successive parts of Omar Series for Clinical Diagnosis of Chemocellular Reactions deal with the enhancing of the vital importance of chemistry to human life by addressing the following topics: 1) The structure and chemical behavior of biomolecules. These are the organic (carbon-containing) compounds that make up the various parts of the living cell. The majority of these biomolecules fall into one of four categories: nucleic acids, proteins, carbohydrates and lipids. 2) Chemical reactions of substances in living cells and their specific catalyzed enzymes which called metabolism . 3) The most basic of life processes, such as a) the synthesis of DNA which carries the genetic information, b) the synthesis and function of proteins which can provide structure or catalyze biological reactions, and c) the production and storage of energy. 4) Signs of active and inhibition of metabolic pathways and the resulting various disorders or diseases in the mechanisms of clinical diagnosis.