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CAIE A-Level Biology 19.1.6 Marker Genes for Gene Expression

Practise using fluorescent or selectable marker genes to identify transformed cells and infer whether a nearby gene of interest has been expressed.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • place a fluorescent marker beside the gene of interest under the same promoter
  • use UV fluorescence, GUS staining or survival after selection to identify transformed cells
  • interpret presence or loss of marker product as evidence for gene expression or deletion

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