MICRO CH13&14

MICRO CH13&14 - Chapter 13.3-13.7 Energetics &...

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Chapter 14 Metabolism ______________________ ________________________ molecules for energy Catabolic pathways breakdown large molecules in a series of steps coupled to ______________________ Using energy to ______________ cell components ______________________ Balance between Central ____________________________________ used for both TCA cycle, glycolysis, pentose phosphate shunt
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Metabolism Sunlight Reduced geological compounds (rocks, inorganic compounds) (Reduced) biological macromolecules (starch, fats) (First energy source) (Major energy source today) (Energy source for animals) Energy CATABOLISM Phototrophy Lithotrophy Organotrophy ATP Short-term energystorage ANABOLISM Carbon, nitrogen, water Long-term energy storage Biosynthesis Catalysis and Enzymes Activation energy- energy required to bring all molecules in a Enzymes - speed up biochemical lower activation energy by bringing substrates into ___________________________________- portion of an enzyme to which substrate binds. Substrate ------------------ product(s) aldolase enzyme: Fructose-1,6-bisphosphate glyceraldehyde-3- phosphate + dihydroxyacetone phosphate Very specific for their substrate
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Cellulose vs. starch example Enzymes can have __________________________________________ that help in catalysis but ______________________________________________________. Two types: 1. Prosthetic groups- bound tightly to their enzyme, Example- heme group in cytochromes 2. Coenzymes- loosely bound to their enzyme, may associate with Example- NAD+, derivative of niacin Enzymes are named either for the For example, cellulase breaks down hydrolases break various chemical bonds with the addition of water Catabolism: The Microbial Buffet Microbes have great catabolic diversity
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MICRO CH13&14 - Chapter 13.3-13.7 Energetics &...

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