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IB Biology
A Unity and Diversity
A1.1 Water
A1.2 Nucleic acids
A2.1 Origins of cells
A2.2 Cell structure
A3.1 Diversity of organisms
A4.1 Evolution and speciation
A4.2 Conservation of biodiversity
B Form and Function
B1.1 Carbohydrates and lipids
B1.2 Proteins
B2.1 Membranes and membrane transport
B2.2 Organelles and compartmentalisation
B2.3 Cell specialisation
B3.1 Gas exchange
B3.2 Transport
B4.1 Adaptation to environment

A2.2 Cell structure

Cell structure connects microscopy, universal cellular organization, prokaryotic and eukaryotic diversity, specialized exceptions, differentiation, and evolutionary explanations for complex cells and multicellularity.

Syllabus
First assessment 2025
Topic
A2.2
Level
SL

Exam analysis

Chance of appearing61%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1
Typical marks1

Most tested objectives

Common question formats

  • Definition or recall
  • Graph interpretation
  • Process explanation
  • Calculation

Recent exam appearances

November 2025Paper2 ["SL"] · TZ13(d)[ 1 ]A2.2.9—Atypical cell structure
November 2025Paper2 ["SL"] · TZ13(c)[ 1 ]A2.2.8—Differences in eukaryotic cells
November 2025Paper2 ["SL"] · TZ13(b)[ 1 ]A2.2.6—Eukaryote cell structure
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Coverage 2010–2025 · Updated 15 Jul 2026

Objective notes

3 learning objectives
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Adrian Wong, IB & A-Level Physics Educator

Adrian Wong

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Priya Nair

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