Outline5 marksStandard
Severe combined immunodeficiency (SCID) is a genetic disorder in which the immune system is severely compromised. Outline how gene therapy could be used to treat SCID by supplying a working gene.
CAIE A Level Biology 9700 · Genetic technology
Genetic technology: outline question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.
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