Microbial Metabolism - Microbial Metabolism Metabolism is...

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Unformatted text preview: Microbial Metabolism Metabolism is the sum of the chemical reactions in an organism. Catabolism is the energy-releasing processes. Anabolism is the energy-using processes. Catabolism provides the building blocks and energy for anabolism. Microbial Metabolism Figure 5.1 A metabolic pathway is a sequence of enzymatically catalyzed chemical reactions. Metabolic pathways are determined by enzymes. Enzymes are encoded by genes. The collision theory Activation energy Reaction rate Reaction rates are increased by enzymes or by increasing temperature or pressure. Enzymes Figure 5.2 Biological catalysts Apoenzyme: protein Cofactor: Nonprotein component Coenzyme: Organic cofactor Holoenzyme: Apoenzyme + cofactor Enzymes Enzymes Figure 5.3 NAD + NADP + FAD Coenzyme A Important Coenzymes Enzymes Figure 5.4 Oxidoreductase Oxidation-reduction reactions Transferase Transfer functional groups Hydrolase Hydrolysis Lyase Removal of atoms without hydrolysis Isomerase Rearrangement of atoms Ligase Joining of molecules, uses ATP Enzyme Classification Enzymes can be denatured by temperature and pH Factors Influencing Enzyme Activity Figure 5.6 Temperature Factors Influencing Enzyme Activity Figure 5.5a pH Factors Influencing Enzyme Activity Figure 5.5b Substrate concentration Factors Influencing Enzyme Activity Figure 5.5c Competitive inhibition Factors Influencing Enzyme Activity Figure 5.7a, b Noncompetitive inhibition Factors Influencing Enzyme Activity Figure 5.7a, c Feedback inhibition Figure 5.8 RNA that cuts and splices RNA Ribozymes Oxidation is the loss of electrons....
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This note was uploaded on 01/16/2012 for the course BIOLOGY 251 taught by Professor Lancebowen during the Fall '10 term at Truckee Meadows Community College.

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Microbial Metabolism - Microbial Metabolism Metabolism is...

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