Doctors investigated condition K. In people with condition K, fatty material builds up inside arteries supplying the leg muscles.
No pathogen was found in samples taken from people with condition K.
The table shows the results of a five-year study.
| Group | Number of people in the group | Number who developed condition K |
|---|---|---|
| People sharing a home with a person who had condition K | 600 | 12 |
| People not sharing a home with a person who had condition K | 1500 | 30 |
Calculate the percentage of people who developed condition K in each group.
Using your answers to part (a) and the laboratory result, explain why condition K should be classed as a non-communicable disease. Predict whether asking people with condition K to avoid close contact with other people would reduce the incidence of the condition.
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.