A-LevelBiologyInfectious diseasesMay/June 2010Paper 1 Q21 Mark

Which statement is an example of epidemiological evidence linking smoking to lung cancer?

Q: What topic does this question test?

This question tests Infectious diseases in A-Level Biology (syllabus code 9700). It is worth 1 mark.

AChemical analysis of tar from cigarettes shows that it contains carcinogens.

BDogs made to inhale the smoke from cigarettes develop lung tumours.

CThe incidence of lung cancer increases in a population as more cigarettes are smoked.

DWhen tar from cigarettes is rubbed onto the skin of mice, the mice develop skin tumours.

✓ Correct Answer

The correct answer is C: The incidence of lung cancer increases in a population as more cigarettes are smoked.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This multiple-choice question tests Infectious diseases in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology May/June 2010 examination, Paper 1 Variant 2.

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