Outline 12.doc - Metabolism Overview Definition: Catabolism...

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Metabolism Overview Definition: sum of all cellular biochemical reactions Types of Metabolic Reactions Catabolism o Breakdown of complex molecules to simpler products ( Fig 13.13 ) (Slide  1)  o Produces energy (ATP) and reductants (NADH, FADH 2 , NADPH) and  heat  There is no such thing as a perfect machine Energy and reductants consumed by anabolic reactions Anabolism o Synthesis of complex macromolecules and cells from simpler precursors  ( Fig 15.2 ) (Slide 2) o Also known as BIOSYNTHESIS o Requires reductants and energy input There are only a few reversible metabolic reactions o Such pathways can function ana- and catabolically Anabolical reactions- strong and Catabolical is weak o Known as AMPHIBOLIC PATHWAYS, e.g. some steps in Glycolysis  and the Krebs Cycle   Catabolic Reactions (e.g. Oxidation of Glucose) Catabolite: substrate for catabolic reaction  
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