A-LevelBiologyImmunityMay/June 2011Paper 1 Q371 Mark
The disease smallpox has been eradicated by a worldwide vaccination programme. Which set of reasons correctly identifies the problems associated with planning vaccination programmes to eradicate other diseases? [Figure: Table with columns 'TB', 'malaria', 'sickle cell anaemia', 'cholera']
Ainvade gut cells where immune system less effective genetically inherited recessive condition different vaccines needed for active and dormant-to-active forms poor response with malnourished children; boosters then required
Bdifferent stages with different antigens; invades body cells poor response with malnourished children; boosters then required genetically inherited recessive condition different vaccines needed for active and dormant-to-active forms
Cdifferent vaccines needed for active and dormant-to-active forms different stages with different antigens; invades body cells genetically inherited recessive condition invade gut cells where immune system less effective
Dgenetically inherited recessive condition different vaccines needed for active and dormant-to-active forms invade gut cells where immune system less effective different stages with different antigens; invades body cells
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of immunity 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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