A-LevelBiologyImmunityOct/Nov 2019Paper 1 Q401 Mark
Which features of monoclonal antibodies make them useful in the diagnosis and treatment of disease? 1 A particular monoclonal antibody attaches to a specific antigen. 2 Identical monoclonal antibodies can be produced in large numbers. 3 Binding a monoclonal antibody to its specific antigen may mark that antigen for destruction by white blood cells. 4 Fluorescent or radioactive markers can be attached to a monoclonal antibody to show where the antigen is in the body.
A1, 2, 3 and 4
B1, 2 and 3 only
C2 and 3 only
D3 and 4 only
✓ Correct Answer
The correct answer is A: 1, 2, 3 and 4
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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