09 Lec 9 metabolism - I. Basic concepts and terminology II....

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Unformatted text preview: I. Basic concepts and terminology II. What do organisms need to grow? III. Energetics and enzymes IV. Redox reactions V. Methods of metabolisms 1. Respiration (aerobic and anaerobic) 2. Fermentation 3. Phototrophic growth Microbial Metabolism Microbial Metabolism Reading : Textbook from Sylvia et al., 2004. Chapter 3, page 54-84 The ultimate goal of all forms of metabolisms is to obtain the energy and C needed for the production of cellular constituents necessary for growth, survival and reproduction Metabolism: Sum of all chemical reactions that occur within living cells Basic concepts Energy generation - catabolism Biomass synthesis - anabolism Metabolism: Sum of all chemical reactions that occur within living cells Anabolism: Sum of all biosynthesis reactions in the cells, use energy Catabolism: Biochemical reactions that break down large molecules, releasing usable energy for the cells Basic concepts Microorganisms can be categorized with respect to: a) source of energy b) source of reducing equivalents (=electrons) c) source of carbon for anabolism Terminology Terminology Energy source- Light - Organic chemical- Inorganic chemical Energy source Phototrophs : algae, cyanobacteria Terminology Energy source Chemotrophs : all non photosynthetic cellular organisms They break chemical bonds (from organic or inorganic substances) to generate energy Terminology Reducing equivalent (electrons-) source Terminology Organotrophs : fungi, protozoa, most bacteria Lithotrophs : algae, cyanobacteria, bacteria Carbon source Heterotrophs : Most organisms obtain their C from degradation of organic compounds Autotrophs : inorganic C (CO 2 ) is the source for cell C = primary producers (algae, some bacteria) Terminology Metabolic classification Type Electron donor...
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This note was uploaded on 04/02/2010 for the course ESPM 131 taught by Professor Pallud during the Spring '10 term at University of California, Berkeley.

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09 Lec 9 metabolism - I. Basic concepts and terminology II....

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