A-LevelBiologyGas exchangeMay/June 2022Paper 1 Q351 Mark
Which statements about the human gas exchange system are correct? 1 The absence of cartilage in small bronchioles allows them to expand. 2 The walls of the alveoli are made of cuboidal epithelium. 3 Alveoli secrete a substance which reduces surface tension. 4 The trachea and bronchi are supported by rings of cartilage.
A1 and 2
B1 and 3
C2 and 4
D3 and 4
✓ Correct Answer
The correct answer is B. 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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