bio lecture 12.energetics & metabolism

bio lecture 12.energetics & metabolism - 9/17/2011...

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9/17/2011 1 Energetics & Metabolism Dr. Mark Holbrook Energetics and Metabolism Energy Chemical reactions Open versus closed systems Energy coupling Metabolism = The totality of chemical reactions in an organism Metabolism can be considered as a web of interconnecting energy transformations
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9/17/2011 2 Energy Flow and Chemical Recycling Energy in ATP comes ultimately from light energy 9.2 and cyanobacteria Energetics and Metabolism Catabolic pathways + energy Amino acids polypeptide Translation Energy (Degradation) Anabolic pathways + Light energy (Biosynthesis) Energy Capacity to cause change Kinetic energy: motion heat (= transformation of energy due to temperature difference) Potential energy: gravitational chemical energy “Work” = transformation of energy not due to temperature difference (i.e., heat) Study of energy transformations = Thermodynamics “System” = part of universe under study “Surroundings” = rest of universe
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9/17/2011 3 Laws of Thermodynamics
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This note was uploaded on 10/11/2011 for the course BIO 010 taught by Professor Holbrook during the Spring '11 term at Iowa State.

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bio lecture 12.energetics & metabolism - 9/17/2011...

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