A-LevelBiologyGas exchangeOct/Nov 2021Paper 1 Q331 Mark
The image shown is a photomicrograph of a transverse section of part of the gas exchange system. [Figure showing a photomicrograph] What describes the image?
Athin inner layer of ciliated epithelial cells on top of a layer containing cartilage, supported by elastic fibres
Bvery thin epithelial lining with walls containing elastic fibres, surrounded by many blood vessels
Can inner layer of ciliated epithelial and goblet cells on top of elastic fibres, supported by an outer layer consisting of cartilage
Dan inner layer of ciliated epithelial and goblet cells on top of loose tissue with mucous glands, supported by a continuous ring of cartilage
✓ 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep