Living Cell - Living Cell Is a miniature factory where...

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Living Cell Is a miniature factory where thousands of reactions are occurring Metabolism : Totality of chemical reactions Ø Catabolism or breakdown reactions complex biomolecules simple molecules ( energy release ) Ø Anabolism or synthesis reactions simple molecules complex biomolecules ( energy consumption )
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TWO LAWS of Thermodynamics Obeyed by ALL chemical reactions 1st Law : Energy can be converted from one form to another. Energy cannot be created or destroyed 2nd Law : Every reaction has to increase disorder or entropy . Loss of free energy as unusable energy or heat
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Organism d Order by E ±ntropy of environment § Cell to grow or survive, must &order and requires free energy input § Free energy removed from universe ie: sunlight or food § &free energy or & entropy of environment
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Free Energy Change ∆G or free energy difference between reactants and products When ∆G < 0 (exergonic) Reaction is spontaneous When ∆G > 0 (endergonic) Reaction requires energy
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Living Cell - Living Cell Is a miniature factory where...

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