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Chapter 8 An Introduction To Metabolism. Metabolism. Catabolic Pathways. Anabolic Pathways. Energy. Kinetic Energy. Potential Energy. Activation Energy. Activation Energy. Potential Energy. Energy Transformation. 1st Law of Thermodynamics. 2nd Law of Thermodynamics.
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Activation Energy Activation Energy Potential Energy
Summary • The quantity of energy in the universe is constant, but its quality is not.
Free Energy G = H - TS G = free energy of a system H = total energy of a system T = temperature in oK S = entropy of a system
Reaction Types • Exergonic: • Endergonic:
Biological Examples • Exergonic – • Endergonic -
Adenine Phosphates Ribose
ATP vs Food • ATP: • Food:
ATP in Cells • A cell's ATP content is recycled every minute. • Humans use close to their body weight in ATP daily. • No ATP production equals quick death.
Chemical Reaction AB + CD AC + BD
Enzyme Terms • Substrate – - ase
Substrate Active Site