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IB Biology HL D2.2.6 Hl Epigenetic Tags Questions

Analyse how promoter DNA and histone modifications change chromatin access, transcription and tumour-related gene expression in IB Biology HL D2.2.6.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify DNA or nucleosome methylation, acetylation or related chemical modification as an epigenetic tag that can alter gene expression.
  • Explain how promoter DNA methylation represses transcription and how histone modification changes chromatin access to DNA.
  • Interpret methylation patterns in tumour and normal tissue and relate altered methylation to tumour-suppressor gene expression.

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Study D2.2.6 (HL)—Epigenetic tags conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D2.2.6 Hl Epigenetic Tags Questions question 1

[Maximum number: 1]

Nucleosomes help to regulate transcription in eukaryotes.

State a chemical modification of a nucleosome that could impact gene expression.

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