Enzymes: How They Work, What Affects Them & Food Tests
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Enzymes: How They Work, What Affects Them & Food Tests
An audio revision episode covering Edexcel GCSE Biology Topic 1.2 — Enzymes. We explore what enzymes are and how they work, the factors that affect enzyme activity, digestive enzymes and their roles, how to calculate rates of enzyme activity, and the four key food tests you need to know for your exam.
8/6/2026 · 8:48
Episode Overview
Episode 2 — Topic 1.2: Enzymes
This episode covers the complete Edexcel GCSE Biology (1BI0) specification for Topic 1.2. Chapters include:
- What Are Enzymes?
- How Enzymes Work — The Active Site
- Denaturation
- Factors Affecting Enzymes (Temperature, pH, Substrate Concentration)
- Digestive Enzymes as Biological Catalysts
- Calculating Rates of Enzyme Activity
- Practical Food Tests
- Exam Tips
Next episode: Topic 1.3 — Movement In and Out of Cells (Diffusion, Osmosis, Active Transport)
Sources
All content sourced directly from Save My Exams revision notes for Edexcel GCSE Biology (1BI0):
- The Action of Enzymes — Save My Exams Edexcel GCSE Biology 1.2.1
- Factors Affecting Enzymes — Save My Exams Edexcel GCSE Biology 1.2.2
- Enzymes as Biological Catalysts — Save My Exams Edexcel GCSE Biology 1.2.5
- Rate Calculations for Enzyme Activity — Save My Exams Edexcel GCSE Biology 1.2.4
- Practical Food Tests — Save My Exams Edexcel GCSE Biology 1.2.6
Audio Notes
Includes intro music (8 seconds) and outro music (10 seconds) — calm piano and strings theme, consistent across all episodes in this series.
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