DP Biology (last assessment 2024)

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Question 18N.2.SL.TZ0.1f

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.2.SL.TZ0.1f
Level SL Paper 2 Time zone TZ0
Command term Suggest Question number f Adapted from N/A
f.
[Maximum mark: 1]
18N.2.SL.TZ0.1f

Trends in tobacco smoking and mortality due to lung cancer were measured in male and female smokers aged 35 to 59 living in the United Kingdom from 1950 to 2000. The first graph represents the proportion of smokers in the population. The second graph represents the mortality rate (deaths per year per 100 000 people) from lung cancer.

 

The incidence of lung cancer in 75-year-old males was studied comparing current smokers, former smokers and non-smokers.

(f)

Among 75-year-old lifelong non-smokers the percentage incidence of lung cancer was 0.01 %. Suggest one possible cause of lung cancer in non-smokers.

[1]

Markscheme

passive smoking/second hand smoke/exposure to radon/asbestos/pollution/smog/genetic predisposition ✔

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