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Enzymes and respiration

Free ESAT Biology lesson. Worked examples, common mistakes and a self-check.

What the lesson covers

  • Enzymes: biological catalysts (B8.1)
  • The active site and specificity (B8.2)
  • Temperature, pH and concentration (B8.3)
  • The digestive enzymes (B8.4)
  • Investigating enzymes
  • Aerobic respiration (B9.1)
  • Anaerobic respiration and exercise (B9.1)
  • Measuring respiration and putting it together
  • Self-check questions with answers (8)

Specification: B8.1-8.4, B9.1. Codes follow the UAT-UK ESAT content specification.

How to use it

  1. Read a section, then cover the worked example and try it yourself.
  2. Check the common mistakes list: these are the slips the real test is built to catch.
  3. Do the self-check without looking back. Mark it against the answers.
  4. Then practise the topic under time, with the matching practice set.
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