LS_2_Lec_4_Enzymes

LS_2_Lec_4_Enzymes - Life Sciences 2 Energy, Enzymes, &...

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1 Life Sciences 2 Chapter 8 Dr. Joseph Esdin Proteins • Proteins made inside the cell are found – Embedded or attached to the plasma membrane – In the cell cytosol
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2 Enzymes and Metabolism • In living organisms, thousands of chemical reactions occur • Metabolism is the combination of all chemical reactions Metabolism • Catabolic reactions – Breakdown molecules to release energy • Anabolic reactions – Use energy to build complex molecules from simple ones
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3 Energy and the Laws of Thermodynamics • Bioenergetics is the flow of energy in biochemical systems • Energy is defined as the capacity to do work Energy and the Laws of Thermodynamics • Kinetic energy is the energy associated with motion – Muscle activity, light, thermal energy • Potential energy is the energy of state or position -
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4 Energy and the Laws of Thermodynamics As the diver climbs, KE is used Diver has PE Diver is converting PE to KE * Energy and the Laws of Thermodynamics Energy before and after transformation is equal (no energy is created or lost) After energy transformation the amount of energy available to do work is less
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5 Energy and the Laws of Thermodynamics • With repeated energy transformations
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This note was uploaded on 08/15/2011 for the course LS 2 taught by Professor Pires during the Spring '08 term at UCLA.

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LS_2_Lec_4_Enzymes - Life Sciences 2 Energy, Enzymes, &...

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