A-LevelBiologyGas exchangeOct/Nov 2015Paper 1 Q281 Mark
Which reactions take place in a capillary in an active tissue? 1 carbon dioxide and water are formed from hydrogencarbonate ions and hydrogen ions 2 carbonic acid is formed from carbon dioxide and water 3 carbaminohaemoglobin is formed from carbon dioxide and haemoglobin 4 haemoglobin and hydrogen ions are formed from haemoglobinic acid
A1 and 2
B1 and 3
C2 and 3
D2 and 4
✓ 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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