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2.2 Animal tissues, organs and organ systems

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Question 21

A scientist grew cells from a tumour and cells from nearby non-tumour tissue in a laboratory. The table shows the number of cells in each sample at the start and after 24 hours.

SampleNumber of cells at the startNumber of cells after 24 hours
Tumour4001600
Non-tumour tissue400800
a.

Calculate the percentage increase in the number of tumour cells after 24 hours.

[1]
b.

Explain why the number of tumour cells increased more than the number of non-tumour cells.

[2]
Markscheme

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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