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Metabolism

Metabolism. Metabolism. Chemical Reactions. Exergonic Rxn Energy is released Endergonic Rxn Energy is absorbed Activation Energy Energy req’d to start rxn Catalyst Decreases E A Speeds up rxns. Energy. Time. Reactants. Products. Chemical Reactions. Anabolic Rxn

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Metabolism

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  1. Metabolism Metabolism

  2. Chemical Reactions • Exergonic Rxn • Energy is released • Endergonic Rxn • Energy is absorbed • Activation Energy • Energy req’d to start rxn • Catalyst • Decreases EA • Speeds up rxns Energy Time Reactants Products

  3. Chemical Reactions • Anabolic Rxn • Materials built up • E usu. absorbed (endergonic) • Ex: Photosynthesis 6 CO2 + 6 H2O C6H12O6 + 6 O2 • Catabolic Rxn • Materials broken down • E usu. released (exergonic) • Ex: Cell Respiration ATP Catabolic Anabolic

  4. Cell Energy Needs • Chemical Work • Carrying out endergonic reactions • Mechanical Work • Moving things around • Transport Work • Increasing concentration gradients

  5. Cell Energy Needs Adenine Ribose • ATP • Adenosine triphosphate Phosphate Phosphate Phosphate

  6. Use of ATP • Hydrolysis of ATP is exergonic • Released E can be used to supply E for endergonic rxns

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