Outline4 marksStandard
A researcher is investigating which genes are being expressed in a particular type of human liver cell. Outline how a DNA microarray could be used to detect the mRNA molecules present in these cells.
CAIE A Level Biology 9700 · Genetic technology
Genetic technology: outline question
How this question is marked
4 marks, so the mark scheme is looking for about 4 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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