Unit 7 Bioenergetics

Unit 7 Bioenergetics - 1 Bioenergetics Reading: Chapter 2,...

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Unformatted text preview: 1 Bioenergetics Reading: Chapter 2, Pages 31-38 Learning Goals Identify the characteristics of a biochemical reaction that determine whether it will proceed spontaneously and the rate at which it will proceed a) Explain in general terms what is meant by the change in entropy ( S) of a reaction, and how this value relates to the tendency of a reaction to proceed spontaneously. b) Explain in general terms what is meant by the change in free energy ( G) of a biochemical reaction, how G relates to S, and how the value of G predicts the tendency of a reaction to proceed spontaneously. c) Distinguish between equilibrium and steady state biochemica reactions using flow diagrams, and indicate which kind of reaction predominates in living organisms. d) Explain how a steady state maintains a constant intracellular concentration of a particular molecule, even though it is being continually synthesized and consumed in other reactions. a) Distinguish between equilibrium and steady state biochemical reactions using flow diagrams, and indicate which kind of reaction predominates in living organisms. b) Explain how a steady state maintains a constant intracellular concentration of a particular molecule, even though it is being continually synthesized and consumed in other reactions. c) Defend the proposition that the homeostasis observed in organisms is the result of steady-state processes and not equilibrium reactions. d) Explain how coupled reactions allow an energetically favorable process ( e.g. ATP hydrolysis) to drive an energetically unfavorable process ( e.g. phosphodiester bond formation). Learning Goals Explain how coupled reactions can be used to drive an energetically unfavorable biochemical process Bioenergetics How do cells obtain energy to maintain all of their diverse cellular activities? 2 Energy in the cell: Chemical Electrical Thermal Mechanical Chemical Electrical Thermal Mechanical ENERGY in organisms Understand Energy and Chemical Reactions in the Cell Energy Potential Kinetic Thermodynamics First Law of Thermodynamics Second Law of Thermodynamics Free Energy Enthalpy (heat) energy Entropy (disorder) What is Energy?What is Energy?...
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This note was uploaded on 12/10/2009 for the course MCDB 1150 at Colorado.

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Unit 7 Bioenergetics - 1 Bioenergetics Reading: Chapter 2,...

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