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B2.3 Cell specialization

Cell specialization links selective gene expression, stem cell potency, cell size, exchange surfaces, and specialized tissues to biological function in multicellular organisms.

Syllabus
First assessment 2025
Topic
B2.3
Level
SL

What you’ll learn

6 learning objectives

Choose one objective for a focused lesson, or study the complete topic.

Exam analysis

An aggregate view of how the complete B2.3 Cell specialization appears across past papers.

Chance of appearing31%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1

Most tested objectives

  1. B2.3.6—Surface area-to-volume ratios11 questions
  2. B2.3.8 (HL)—Pneumocytes in alveoli9 questions
  3. B2.3.2—Properties of stem cells8 questions

Common question formats

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

Exam question appearances

November 2025Paper1A ["SL"] · TZ110[ 1 ]B2.3.5—Cell size as specialization
May 2025Paper1A ["SL"] · TZ311[ 1 ]B2.3.4—Types of stem cells
May 2025Paper1A ["SL"] · TZ210[ 1 ]B2.3.1—Differentiation after fertilization
May 2025Paper1A ["SL"] · TZ110[ 1 ]B2.3.4—Types of stem cells
November 2024Paper1 ["SL"] · TZ126[ 1 ]B2.3.8 (HL)—Pneumocytes in alveoli

Coverage 2010–2025 · Updated 15 Jul 2026

Study checklistB2.3 Cell specialization