A-LevelBiologyTransport in mammalsOct/Nov 2019Paper 1 Q311 Mark
The graph shows oxygen dissociation curves of haemoglobin at two different carbon dioxide concentrations. The partial pressure of oxygen in the lungs is 100 mmHg. The partial pressure of oxygen in metabolically active tissues is 35 mmHg. [Figure 31.1] What is the percentage saturation of haemoglobin with oxygen at the lungs and in metabolically active tissues?
Alungs: 92, metabolically active tissue: 40
Blungs: 92, metabolically active tissue: 66
Clungs: 94, metabolically active tissue: 40
Dlungs: 94, metabolically active tissue: 66
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of transport in mammals 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