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2.2 Animal tissues, organs and organ systems

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Question 24

Students investigate the effect of pH on protease activity. In each test, they mix protease solution, a cloudy protein suspension and a buffer solution. They record the time taken for the mixture to become clear, then repeat the test using buffers with different pH values.

Give two factors, other than pH, that should be kept the same in every test.

[2]
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2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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