Lecture_09 - Lecture 9 Overview of Metabolism BBOM 11e Sec....

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1 Lecture 9 Lecture 9 Review Energy and Redox Reactions Fermentation Fermentation BBOM 11e Sec. 5.4-5.8 BBOM 11e Sec. 5.9-5.10, 17.19-17.20 (Appendix I) Overview of Metabolism Overview of Metabolism BBOM 11e Sec. 2.4 Overview of Metabolism BIOSYNTHESIS Cellular and Population Growth Anabolism: All biosynthetic (ATP-consuming) reactions Energy Sources: Chemicals Light Waste Products (End Products): Acids Alcohols CO2 H2O, … Catabolism: All reactions in the cell leading to Energy (ATP) production Resources from environment or growth medium
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2 Classes of Microorganisms Based on Source of Energy Classes of Microorganisms Light Phototroph Chemical Chemotroph Organic Chemoorganotroph Inorganic Chemolithotroph Source Class Microbes can get energy for growth from many different sources Read: BBOM 11e Sec 2.4 = Heterotroph Redox Reactions The Electron Tower and Redox Reactions Living cells harvest energy from coupled Oxidation and Reduction electron transfer half-reactions. H 2 Ù 2H+ + 2e- (Oxidation) (Reduction) 2H+ + 2e- + ½ O 2 Ù H 2 O (Overall Rnx) H 2 + ½ O 2 => H 2 O The Electron Tower: Gives reduction potentials of redox couples Free Energy Yield See BBOM 11e Appendix I e- DONOR e- ACCEPTOR 1.24V Eo’ G’o = -nF Eo’ = -2 x 96.48 kJ/V x 1.24 V = -239.27 kJ /mol
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3 Electron Carriers NAD and NADP Electron Carriers NAD and NADP Nicotinamide Adenine Dinucleotide Redox Coenzymes NAD NADP 2H+ + 2e- Intermediate electron carriers
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Lecture_09 - Lecture 9 Overview of Metabolism BBOM 11e Sec....

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