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IB Biology HL A1.2.13 Nucleosome Structure Question Bank

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

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Describe DNA wrapped around eight histones, with linker DNA and an additional H1 histone.
  • Explain how nucleosome packing and histone modification regulate access to genes.
  • Identify histone, DNA and core-region features in labelled nucleosome diagrams.

A1.2.13 (HL)—Structure of a nucleosome question 1

[Maximum number: 1]

Nucleosomes help to regulate transcription in eukaryotes.

State the components of a nucleosome.

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