Enzymes - Y EAR 12 AS Biology 29th November 2005 Enzymes Mr...

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YEAR 12 - AS Biology 29 th November 2005 Enzymes Mr Potter
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Lesson Objectives Enzyme unit overview What are they? How they work Activation energy What controls their activity Rates of reaction Substrate/enzyme concentrations Temperature, pH Enzyme inhibitors Practical to demonstrate “Catalase” activity in different tissue samples
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Previous related topics covered? Enzyme controlled reactions? Proteins? Lipase, protease, pectinase, amylase etc? “Lock & Key” molecular structures?
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By the end of the unit you should be able to:- Explain enzymes as Globular Proteins which act as catalysts Explain their catalytic action in terms of lowering activation energy Describe examples of enzyme-catalysed reactions Discuss factors affecting reaction rates and inhibition Describe how to investigate these effects experimentally
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Enzymes:- Are defined as a BIOLOGICAL catalyst i.e. something that speeds up a reaction. Up to 10 12 fold Usually end in ‘…ase’.
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