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Lecture 9-1201

Lecture 9-1201 - Lecture9 19:43...

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Lecture 9 19:43 Fig 8.6, 8.14, 8.9, 8.8, 8.10, 8.12, 8.16, 8.13, 8.17 Activation Energy G double dagger energy necessary for reaction to occur temperature is a measure of how  many molecules will have achieved the activation energy Some organisms have low body temperatures Low temperature-low energy associated with molecules Fewer molecules have energy greater than the activation energy how do  these organisms support chemical reactions? Biological Reactions are temperature dependent  The colder the temperature the slower the rate For every 10C decrease a 50% decrease in rate How do you increase metabolic reaction rates? Increase the amount of enzyme Make a better enzyme o A better catalyst Enzymes Work by accelerating reaction rates What property would you want a better catalyst to display Lower the activation energy barrier ( G double dagger) to a greater extent Test this hypothesis Enzyme homologs from cold vs. warm -adapted organisms
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