A-LevelBiologyGas exchangeOct/Nov 2011Paper 1 Q341 Mark
Which observation would indicate a difference between the structure of the gas exchange system of a cigarette smoker and a non-smoker?
Athe absence of ciliated epithelium in the bronchioles
Bthe decrease in elastic fibres in the bronchioles
Cthe enlargement of goblet cells in the bronchi
Dthe increase in smooth muscle
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of gas exchange within the Biologysyllabus. The examiner's mark scheme requires...
📋 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...
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