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Enzymes and active sites

Enzymes and active sites

An enzyme is a protein that acts as a biological catalyst. It speeds up a specific reaction without being used up or permanently changed, so one enzyme molecule can catalyse the reaction repeatedly.

1.3 Enzymes Lesson

  1. GCSE
  2. /Biology
  3. /1.3 Enzymes

Step-by-step lessons on Edexcel GCSE Biology 1.3 Enzymes, covering 1.3.1 Mechanism of enzyme action, 1.3.2 Denaturation of enzymes, 1.3.3 Factors affecting enzyme activity, and 1.3.4 Measuring energy in food by calorimetry. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons