Researchers use fluorescently labelled monoclonal antibodies to locate root-hair-forming cells in maize roots. They want to label these cells while avoiding other cells in the root epidermis. The table shows the percentage of sampled cells in which each antigen was detected.
| Antigen | Root-hair-forming cells | Other root epidermal cells |
|---|---|---|
| A | 95% | 0% |
| B | 100% | 18% |
| C | 72% | 0% |
Which antigen is the most suitable target for locating root-hair-forming cells while avoiding labelling other root epidermal cells? Justify your choice using the data and predict what would happen to root-hair-forming cells in which the selected antigen is absent.
87 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.