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Chemistry of Life Part II -Chemical Reactions -Enzymes -Water

Chemistry of Life Part II -Chemical Reactions -Enzymes -Water. Enzymes – catalysts or “biological wedges”. Activation Energy – the necessary energy input to jumpstart a reaction. Energy-Releasing Reaction. Energy-Absorbing Reaction. Activation energy. Products. Activation energy.

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Chemistry of Life Part II -Chemical Reactions -Enzymes -Water

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  1. Chemistry of LifePart II-Chemical Reactions-Enzymes-Water

  2. Enzymes – catalysts or “biological wedges” Activation Energy – the necessary energy input to jumpstart a reaction

  3. Energy-Releasing Reaction Energy-Absorbing Reaction Activation energy Products Activationenergy Reactants Reactants Products Energy of Reactions Endothermic Exothermic

  4. Enzymes: -Regulate chemical pathways -Make materials that cells need -Release energy

  5. Enzyme Video • http://www.youtube.com/watch?v=CZD5xsOKres&feature=related

  6. H20

  7. Slight Negative Charge Water’s Polarity Slight Positive Charge

  8. hydrogen bonding -the attraction between water molecules • 2 polar ends attract each other • A weak bond between the H of one atom and the O of another in water (or any electroneg…) • H20 can hydrogen bond with 4 other H20 molecules

  9. Properties of Water Universal Solvent-due to its polarity -Salts, sugars, acids, bases -Hydrophobic vs hydrophilic

  10. Cohesion Causes Surface Tension

  11. Adhesion (Capillary Action) http://discovermagazine.com/2003/mar/featscienceof http://www.sciencebuddies.org/science-fair-projects/project_ideas/PlantBio_p033.shtml

  12. Dehydration synthesis- build up by removing water Hydrolysis-break down by adding water

  13. GOOD LUCK!!!

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