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B2.2 Organelles and compartmentalization

Organelles and compartmentalization explain how eukaryotic cells divide work among specialized structures, controlled internal spaces, and directed vesicle transport routes.

Syllabus
First assessment 2025
Topic
B2.2
Level
SL

What you’ll learn

3 learning objectives

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

Exam analysis

An aggregate view of how the complete B2.2 Organelles and compartmentalization appears across past papers.

Chance of appearing21%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper3

Most tested objectives

  1. B2.2.1—Organelles as discrete subunits14 questions
  2. B2.2.4 (HL)—Mitochondrion adaptations9 questions
  3. B2.2.5 (HL)—Chloroplast adaptations5 questions

Common question formats

  • Definition or recall
  • Diagram interpretation
  • Process explanation
  • Structured response
  • Extended response

Exam question appearances

November 2025Paper1A ["SL"] · TZ18[ 1 ]B2.2.1—Organelles as discrete subunits
November 2025Paper2 ["SL"] · TZ13(a)[ 2 ]B2.2.1—Organelles as discrete subunits
November 2025Paper1A ["SL"] · TZ310[ 1 ]B2.2.1—Organelles as discrete subunits
May 2025Paper2 ["SL"] · TZ23(a)[ 2 ]B2.2.1—Organelles as discrete subunits
November 2024Paper1 ["SL"] · TZ12[ 1 ]B2.2.8 (HL)—Golgi apparatus

Coverage 2010–2025 · Updated 15 Jul 2026

Study checklistB2.2 Organelles and compartmentalization