Lec2 Metabolism I - Lecture 2 Energy and Cellular Metabolism I Reading Chapter 2 pp 42 60 Lecture outline I Chemical Composition of Animals II

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Lecture 2: Energy and Cellular Metabolism I Reading: Chapter 2, pp 42 - 60 Lecture outline: I. Chemical Composition of Animals II. Metabolism: Anabolism and Catabolism II. The biochemical process of energy production Glycolysis Krebs cycle Electron transport and oxidative phosphorylation Chemiosis
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I. Chemical composition of animals
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Major molecules of animals
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What makes up the other 55-65% of body mass? Water!
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II. Metabolism = Sum total of an organism’s biochemical reactions. Anabolism: Synthesis of organic molecules required for cell structure function and storage of energy. Catabolism: Breakdown of organic molecules into simpler compounds to release the energy stored in chemical bonds.
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Mechanical work generate force and movement - beating of cilia, contraction of muscles and movement of chromosomes. Biochemical work anabolic and catabolic reactions. Transport work transport of material across plasma membrane. Released energy is utilized to perform cellular work. Repair and Maintenance
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ADP + P i + energy from food ATP (glycolysis and Krebs Cycle) ATP ADP + P i + energy available for cellular functioning
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Energy is stored in chemical bonds. Energy is released when bonds are broken. Energy carriers Energy storage molecules
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Energy Carriers NADH (reduced form stores energy) NAD + (oxidized form releases energy) Most versatile is ATP.
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ATP Energy ADP more stable P P P P P P i Inorganic phosphate + H 2 O + + 7.3 kcal/mol ATP Why is ATP a suitable molecule for this purpose? 1. Because of its structure:
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This note was uploaded on 09/12/2010 for the course BIOLOGY 225 taught by Professor Pavgi during the Winter '10 term at University of Michigan.

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Lec2 Metabolism I - Lecture 2 Energy and Cellular Metabolism I Reading Chapter 2 pp 42 60 Lecture outline I Chemical Composition of Animals II

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