CH 5---Enzymes - Enzymes Enzymes Energy Energy • The...

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Unformatted text preview: Enzymes Enzymes Energy Energy • The capacity to do work • Can not be created or destroyed (1st Law of Thermodynamics) (1 • Can be converted to another form Types of Energy Types Light Kinetic Potential Chemical Heat Energy Energy • Every energy transfer increases the Every disorder of the universe disorder (2nd Law of Thermodynamics) • Entropy – a measure of disorder • Heat – most random (disordered) form of Heat energy energy Energy Energy • Exergonic reaction “energy out” spontaneous – no energy input required breakdown reaction AB A+B E Energy Energy • Endergonic reaction “energy in” non-spontaneous – energy input required synthesis reaction A+B AB E Energy Energy Metabolism – the totality of an organism’s Metabolism chemical processes chemical Anabolic pathways Catabolic pathways Enzymes Enzymes • Speed up chemical reactions without Speed being consumed in the process being • Lower activation energy Enzyme Enzyme Animation Enzyme Naming Enzyme • Name of substrate • What enzyme does – Transferase – Ligase – Hydrolase – Isomerase • Ends in “-ase” Glucose isomerase Glucose Cellulase DNA ligase Enzymes Enzymes Enzyme (E) + Substrate (S) E-S complex E + Product (P) Enzyme Activity Enzyme • Temperature • pH • Ion concentration • Cofactors and coenzymes • Inhibitors ATP ATP ATP Cycle ATP ...
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