7.1 An overview of metabolism Metabolism may be divided into two major parts: catabolism and anabolism. Catabolism: larger and more Waste products complex molecules are broken Nutrients Biosynthesis down into smaller, simpler Energy molecules with the release of for growth energy
Related concepts Aspecies: a collection of strains that have a similar G+C composotion and 70% or greater similarity as judged by DNA hybridization experiments. biovars: variant procaryotic strains characterized by biochemical or physiological differences. Morphovars: differ morphologically Serovars: have distinctive antigenic properties
一、 DEFINITION Fundamental metabolism: water metabolism, mineral nutrition ,photosynthesis, repiration Seed germination,growth, differentiation, flower ing,fertilization
Important Persons in Microbiology History 1684 Antonie van Leeuwenhoek (discovery of bacteria) 1857-1864 Louis Pasteur (lactic acid fermentation, yeast alcohol fermentation, spontaneous generation theory “swan neck flasks”) 1881-1884 Robert Koch (pure culture, cause of tuberculosis, Koch’s postulates, cause of (霍乱) cholera)