A-LevelBiologyTransport in mammalsMay/June 2021Paper 1 Q311 Mark
Which reactions take place in blood that is passing through active tissues? 1 HbO₈ ⇌ Hb + 4O₂ 2 HbO₈ + H⁺ → HHb + 4O₂ 3 HCO₃⁻ + H⁺ → H₂CO₃ 4 H₂O + CO₂ ⇌ H₂CO₃
A1, 2, 3 and 4
B1, 2 and 4 only
C1, 3 and 4 only
D2 and 3 only
✓ Correct Answer
The correct answer is B. 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