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Join Mr White, a biology teacher with 20+ years of experience, for a full lesson on topic 1.6 of the Higher Human Biology course covering Metabolic Pathways, as well as looking at some SQA exam questions on the topic to finish. Keywords metabolic pathways, enzymes, anabolic reactions, catabolic reactions, enzyme inhibition, feedback inhibition, enzyme activity, higher human biology, exam preparation, biology education Summary This lesson focuses on metabolic pathways, exploring their definitions, the role of enzymes, and the differences between anabolic and catabolic reactions. It delves into how enzymes function, the factors affecting their activity, and the types of enzyme inhibition, including competitive and non-competitive inhibition. The lesson concludes with a review of past paper questions to aid exam preparation. Takeaways Metabolic pathways are crucial for cellular processes. Enzymes control the speed of metabolic reactions. Anabolic reactions require energy to build molecules. Catabolic reactions release energy by breaking down molecules. Induced fit is essential for enzyme function. Substrate concentration impacts enzyme activity significantly. Competitive inhibitors block the active site of enzymes. Non-competitive inhibitors alter the shape of the active site. Feedback inhibition helps regulate metabolic pathways. Understanding these concepts is vital for exam success. Sound bites "Anabolic reactions build larger molecules." "Catabolic reactions release energy." "Induced fit lowers activation energy." Chapters 00:00 Introduction to Metabolic Pathways 00:54 Understanding Metabolic Pathways 03:11 Anabolic vs Catabolic Reactions 04:58 Enzyme Function and Metabolism 08:34 Factors Affecting Enzyme Activity 11:15 Types of Inhibition in Enzymes 15:13 Feedback Inhibition Explained 16:08 Past Paper Questions Review
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