character: Mr. Johnson
topic: Enzyme Catalysis and Reaction Rates
grade: 9
subject: Biology
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character: Emily
topic: Factors Affecting Enzyme Activity
grade: 9
subject: Biology
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character: Tom
topic: Mechanisms of Enzyme Action
grade: 9
subject: Biology
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character: Sarah
topic: Energy and Activation Energy in Reactions
grade: 9
subject: Biology
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