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CAIE A-Level Biology 5.1.1 Chromosome Structure and Telomeres

Practise identifying DNA, histones, sister chromatids, centromeres and terminal telomeres in chromosome diagrams without confusing chromosome number with DNA-molecule number.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • describe chromosomal DNA associated with histone proteins rather than free DNA alone
  • identify sister chromatids joined at a centromere after DNA replication
  • locate repetitive telomere DNA at chromosome ends and distinguish it from the centromere

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