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2.1 Supplying the cell

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Question 11

Scientists want to produce ciliated epithelial cells to replace damaged cells in a patient's airways.

They investigate stem cells from two sources. The table shows the percentage of cultures in which each source successfully differentiated into three specialised cell types.

Source of stem cellsSurface skin cells (%)Red blood cells (%)Nerve cells (%)
P: early embryo726870
Q: skin of an adult7500

Explain which source of stem cells, P or Q, the scientists should use to produce the ciliated epithelial cells.

[3]
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2.1 Supplying the cell Questions

  1. GCSE
  2. /Biology
  3. /2.1 Supplying the cell

194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.

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