A viral disease affects the gills of farmed fish. Scientists measured the number of virus particles and the percentage of damaged gill cells in samples from infected fish.
| Time after infection in hours | Number of virus particles per mm³ | Damaged gill cells in % |
|---|---|---|
| 0 | 2.0 × 10³ | 3 |
| 8 | 1.2 × 10⁴ | 12 |
| 16 | 7.5 × 10⁴ | 38 |
| 24 | 4.1 × 10⁵ | 76 |
Using the data and your knowledge, explain how the virus causes damage to the gill tissue.
252 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.