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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
—

What you’ll learn

9 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 appearing24%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1

Most tested objectives

  1. B2.2.1—Organelles as discrete subunits18 questions
  2. B2.2.4 (HL)—Mitochondrion adaptations17 questions
  3. B2.2.7 (HL)—Free ribosomes vs. rough ER14 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 ["HL"] · TZ316[ 1 ]B2.2.6 (HL)—Nuclear membrane benefits
November 2025Paper1A ["HL"] · TZ116[ 1 ]B2.2.4 (HL)—Mitochondrion adaptations
November 2025Paper1A ["SL"] · TZ310[ 1 ]B2.2.1—Organelles as discrete subunits
Practice this topic

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

Coverage 2010–2025 · Updated 15 Jul 2026

Study checklistB2.2 Organelles and compartmentalization