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IB Biology HL A1.2.13 Hl Structure of a Nucleosome Questions

Practise IB Biology HL A1.2.13 by describing histone-wrapped DNA, linker DNA and how nucleosomes regulate access to genes.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Describe a nucleosome as DNA wrapped around an octamer of histones, with linker DNA and histone H1 where shown.
  • Identify DNA, histone and core-region features in nucleosome representations and diagrams.
  • Explain how nucleosomes pack or supercoil chromosomes and regulate transcription through histone or nucleosome state.

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Study A1.2.13 (HL)—Structure of a nucleosome conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL A1.2.13 Hl Structure of a Nucleosome Questions question 1

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Nucleosomes help to regulate transcription in eukaryotes.

State the components of a nucleosome.

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