character: Carl
topic: Chemical Reactions and Catalysts
grade: 9
subject: Biology
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character: Catalyst
topic: Role of Catalysts in Biological Reactions
grade: 9
subject: Biology
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character: Chemistry
topic: Introduction to Chemical Reactions
grade: 9
subject: Biology
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character: Biology
topic: Enzymes as Biological Catalysts
grade: 9
subject: Biology
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