Along with the presentation of information on the structure and function of a bacterial cell, the experimental facts underlying the concepts in the field of general biology and its specialized fields are also presented. Thus, a monograph devoted to the physiology of bacteria is of equal interest to both microbiologists and biologists, biochemists, biophysicists, geneticists and cytologists. Introduction and historical essay, Systematics of bacteria, Anatomical basis of the physiology of bacteria, Chemical composition of a bacterial cell, Physicochemical properties of a bacterial cell, Action of physicochemical factors on a bacterial cell, Action of chemical, disinfecting and antiseptic factors, Biochemical bases of bacterial staining, Bacterial Metabolism Types, Bacterial Enzymes, Bacterial Cell Protein Metabolism, Lipid Metabolism in Bacteria, Carbohydrate metabolism in the bacterial cell, Bacterial respiration, Factors necessary for bacterial growth, The cycle of bacterial development, Variability and heredity in bacteria, Biochemical aspects of relationships: host organism - parasite, Bacteria and the cycle of elements in nature.