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IB Biology A1.2 Nucleic Acids Question Bank

Explore how nucleotide components, bonding, base pairing and sequence give DNA and RNA their structures, information capacity, shared code and experimental significance.

Syllabus
First assessment 2025
Topic
ib_null_biology_001_002
Level
All levels

Learning objectives

Study the full topic, or open one objective for a focused lesson.

Exam analysis

An aggregate view of how the complete A1.2 Nucleic acids topic appears across past papers.

Topic frequencyMEDIUM122 questions across 96 papers
Latest appearanceNovember 2025
Most common paperPaper1

Most tested objectives

  1. A1.2.6—DNA as a double helix26 questions
  2. A1.2.13 (HL)—Structure of a nucleosome17 questions
  3. A1.2.10—Conservation of genetic code14 questions

Common question formats

  • Diagram interpretation
  • Definition or recall
  • Structured response
  • Data analysis
  • Calculation
  • Comparison
  • Graph interpretation

Recent paper appearances

November 2025Paper27(a)[ 4 ]A1.2.9—Diversity of DNA base sequences
November 2024Paper18[ 1 ]A1.2.6—DNA as a double helix
November 2023Paper23(a)[ 1 ]A1.2.1—DNA as genetic material
November 2022Paper16[ 1 ]A1.2.2—Components of a nucleotide
November 2021Paper26(a)[ 4 ]A1.2.5—RNA as a polymer
Practice this topic

1 original exam-style questions based on the patterns above.

Coverage 2010–2025 · Updated 14 Jul 2026

Study checklistA1.2 Nucleic acids