WS6KEY

WS6KEY - Chapter 6 Worksheet KEY pg 1 of 3 Explain the role of catabolic and anabolic pathways in the energy exchanges of cellular metabolism The

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Chapter 6 Worksheet KEY pg 1 of 3 Explain the role of catabolic and anabolic pathways in the energy exchanges of cellular metabolism. The chemistry of life is organized into metabolic pathways. Catabolic pathways involve the breakdown of materials (food) to extract energy and anabolic pathways use this energy to build complex biomolecules necessary for life. Distinguish between kinetic and potential energy. Kinetic energy is associated with a moving object, potential is processed by an object (or a chemical). Explain, in your own words, the first and second laws of thermodynamics. The first law of thermodynamics is that the energy level of the universe is constant, the second law is that the entropy of the universe is increasing because of the loss of energy in systems as heat. Explain why highly ordered living organisms do not violate the second law of thermodynamics. Organisms can be thought of as islands of low entropy surrounded by high-entropy regions. Write and define each component of the equation for free-energy change. The change in free energy (ΔG) = change in enthalpy (ΔH) – temperature in Kelvin (T) x the change in the entropy (ΔS). If ΔG is negative, the reaction is spontaneous and energy is released (exergonic). If ΔG is positive the reaction needs energy to proceed and is endergonic. Explain how changes in temperature influence the maximum amount of usable energy that can be harvested from a reaction. More energy is obtained from a reaction at a higher temperature.
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This note was uploaded on 04/04/2008 for the course BIO 111 taught by Professor Reiss during the Spring '08 term at NMT.

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WS6KEY - Chapter 6 Worksheet KEY pg 1 of 3 Explain the role of catabolic and anabolic pathways in the energy exchanges of cellular metabolism The

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