Diseases and immunity — IGCSE Sciences - Co-Ordinated (0654) questions by topic
Working out a percentage increase in HIV infections from a bar chart, interpreting a coronary heart disease risk profile built from age, family history and lifestyle notes, and calculating a percentage decrease in infections between two given years make up the 6 diseases and immunity questions from 2023 and 2024, worth 6 to 12 marks.
Calculate and state lead the command words, with suggest, identify and explain used for reasoning about risk factors from a case study. Because percentage-change calculations here are easy to invert, drill them and submit for instant marking, so a swapped numerator or missing percentage sign is caught immediately rather than recurring across both increase and decrease questions.
May–June 2024, Paper 41
Fig. 7.1 is a diagram showing the difference in the cells lining the gas exchange system of a person that smokes tobacco and a person that does not smoke tobacco. In the smoker's…
Answer this question and get it marked →May–June 2024, Paper 42
A student investigates antibiotic resistance in one strain of bacteria. They use five different antibiotics on paper discs, placed in a Petri dish with the bacteria and left for…
Answer this question and get it marked →October–November 2024, Paper 31
The number of new infections of HIV in one country was estimated in 2000 and 2018. Table 4.1 shows the results: year 2000 - 280 new infections; year 2018 - 170 new infections.…
Answer this question and get it marked →May–June 2023, Paper 32
The number of new infections of HIV each year in one country is recorded. Fig. 4.1 is a bar chart (number of new HIV infections, years 1998–2008). Calculate the percentage…
Answer this question and get it marked →May–June 2023, Paper 33
The number of new infections of HIV each year in one country is recorded. Fig. 4.1 is a bar chart (number of new HIV infections, years 1998–2008). Calculate the percentage…
Answer this question and get it marked →October–November 2023, Paper 43
Fig. 1.1 shows medical notes from a person at risk of developing coronary heart disease (CHD): Age 68; Family history: No coronary heart disease in the family; Other notes: smokes…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
- Practical skills (146)
- Motion, forces and energy (41)
- Organic chemistry (16)
- Electricity and magnetism (15)
- Waves (14)
- Reproduction (13)
- Nuclear physics (13)
- Coordination and response (12)
- Organisms and their environment (12)
- Metals (11)
- Atoms, elements and compounds (10)
- Stoichiometry (9)