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Biol 112 - Sept. 30 (C)

Biol 112 - Sept. 30 (C) - How Do Enzymes Work Model of...

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28/09/2011 1 How Do Enzymes Work? Model of enzyme action A+B C+D Enzyme Stimulation: 10 6 to 10 14 reactants products (substrates) AA Up to a maximum, enzyme reactions go faster as the temperature increases. Which of the following contributes to the increased rate as the temperature goes up ? 1. The reactants have higher energy levels 2. The maximum of the activation energy for the reaction is lowered. 3. The products have higher energy levels 4. The enzyme has higher energy levels. A. All 4 contribute B. 1 and 2 only C. 2 and 3 only D. 3 and 4 only E. 1 and 4 only AA Enzyme reactions have a temperature where they happen at a maximum rate. Above this maximum, the reactions rate decreases. Which of the following contributes to the decreased rate beyond the maximum ? 1. The energy levels of reactants decreases again. 2 Th b i f th ti i i 2. The energy barrier for the reaction increases again. 3. The products have higher energy levels. 4. The enzyme conformation begins to change.
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