Compare7 marksChallenge
During a primary immune response to a viral infection, T-helper cells and T-killer cells perform distinct but coordinated roles.
Compare the roles of T-helper cells and T-killer cells in this response.
CAIE A Level Biology 9700 · Immunity
Immunity: compare question
How this question is marked
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
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