Chapt.4 Energy and Enzymes

Chapt.4 Energy and Enzymes - Energy, Enzymes, and...

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Energy, Enzymes, and Biological Reactions BIO 2107K: BIOLOGICAL PRINCIPLES I CHAPTER 4
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Metabolism is the set of biochemical reactions that occur in living organisms to sustain life and its activities (maintain itself, grow, reproduce)
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Living organisms engage in metabolic activities
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Metabolism is the set of biochemical reactions that occur in living organisms to sustain life and its activities (maintain itself, grow, reproduce)
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Energy, the Laws of Thermodynamics, and Life 1. Energy exists in different forms and states 2. The laws of thermodynamics describe how energy flows in natural systems irst law of thermodynamics x First law of thermodynamics x Second law of thermodynamics 3. Enzymes accelerate the rate of biological reactions
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Energy exists in different forms and states Energy is the capacity to do work.
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All forms of energy exist in two states Kinetic energy: energy of motion - electrical energy, sound, heat Potential energy: stored energy - “potential” to be converted to kinetic energy - potential energy is stored in the bonds of molecules, too!
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Potential Energy Kinetic Energy
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Energy conversion occurs in living things Food has potential energy that can be converted to kinetic energy
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Energy conversion occurs in living things The chemical reactions that make and break chemical bonds are called metabolic reactions x Catabolic reactions x break down complex molecules x release potential energy for work x Anabolic reactions x convert simple substances into more complex molecules x require energy
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Sugar ENERGY Catabolic Reactions Amino Acids Proteins Anabolic reactions
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This note was uploaded on 03/06/2012 for the course BIOL 2107 taught by Professor J.louten during the Spring '10 term at SPSU.

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Chapt.4 Energy and Enzymes - Energy, Enzymes, and...

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