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CH 3 - Chapter 3 Energy Catalysis and Biosynthesis The...

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9/9/09 1 Chapter 3 Energy, Catalysis and Biosynthesis The Darwin 150 Project Celebrating 150 Years of Charles Darwin a webcast lecture series in four parts shown in Rudder Theater Faculty from Texas A&M University will answer questions after each lecture Hosted by the Department of Biology, the Department of Wildlife and Fisheries Sciences, the Faculty of Neuroscience, and the IRP in Ecology and Evolutionary Biology www.bio.tamu.edu/darwin150 Wednesday, September 16, 7 pm “The World Before Darwin” Everett Mendelsohn, Harvard Wednesday, November 4, 7 pm “The Making of the Fittest: Natural Selection and the DNA Record of Evolution” Sean Carroll, University of Wisconsin Tuesday, November 24, 12 noon “Frontiers of Evolution” E.O. Wilson et al., Harvard Tuesday, November 24, 5 pm “Celebrating 150 Years of 'Origin of Species'" Gerald Edelman, Paul Ekman, Terrence Deacon
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9/9/09 2 Objectives Review basic thermodynamics Understand how chemical reactions can release energy that can be used by the cell Understand how enzymes catalyze chemical reactions Understand the basic properties of enzymes and how they are determined Basic Thermodynamics • First Law of Thermodynamics: Energy cannot by created or destroyed, but it can be converted from one form to another • Second Law of Thermodynamics: Energy spontaneously tends to disperse See http://secondlaw.oxy.edu/ for an excellent review of the Second Law and entropy
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9/9/09 3 The Second Law states that ENTROPY increases whenever anything happens. The text defines entropy as disorder, but more accurately, it is the dispersal of energy. But cells are complex and highly organized.
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