A-LevelBiologyImmunityMay/June 2014Paper 1 Q371 Mark
An antiserum to a snake toxin can be obtained by injecting the toxin into a horse. The antiserum is made from blood plasma taken from the horse a few weeks later. The antiserum is injected into a person who has been bitten by the same species of snake. Which type of immunity occurs as a result of using this antiserum?
Aartificial active
Bartificial passive
Cnatural active
Dnatural passive
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of immunity within the Biologysyllabus. The examiner's mark scheme requires...
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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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