Bio 101 Day 8

Bio 101 Day 8 - How can the activation energy barrier be...

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How can the activation energy barrier be overcome? Catalyst -Does not alter free energy change of a reaction -Does not make impossible reactions occur BUT -Does reduce the required energy of activation Enzyme -A biological catalyst -Increases the rate of a specific biochemical reaction -Is not consumed in the reaction Enzyme-Substrate Complex -Substrate binds to enzyme’s active site -forming enzyme-substrate complex -changes shapes of enzyme and substrate -induced fit helps break and form bonds Most enzymatic reactions are reversible -Under equilibrium conditions Substrate  Product But—a system at equilibrium can do no work Chemical Equilibrium=Death  A Biochemical Pathway Enzyme 1 Enzyme 2 Enzyme 3 Enzyme 4 A-------------- B-------------- C--------- D----------- E (a) Effect of Temperature
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a. If temperature is raised by 10 degrees C doubles rate of reaction b. Hydrogen Bonds are effected (b) Effect of pH a. Most enzymes have the suffix b. Pepsin works in your stomach, it works at pH of 2 c. Trypsin works in the pancreas, it works at pH of 8 d. Ionic bonds are most affected by pH (hydrogen bonds somewhat affected)
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This note was uploaded on 04/06/2010 for the course BIO 01-119-10 taught by Professor D'arville during the Fall '09 term at Rutgers.

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Bio 101 Day 8 - How can the activation energy barrier be...

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