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A2.2.4—Structures common to all cells

Every cell contains a plasma membrane, cytoplasm, genetic material, and ribosomes, providing controlled exchange, metabolic space, inherited information, and protein synthesis.

Syllabus
First assessment 2025
Objective
A2.2.4
Level
SL

Exam analysis

Chance of appearing2%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1A
Typical marks1–2

Common command terms

  • Identify
  • Compare
  • Contrast

Scoring notes

Common mistake
Naming a nucleus or membrane-bound organelle as a structure present in every cell.

Recent exam appearances

November 2025Paper1B ["SL"] · TZ31(c)[ 2 ]A2.2.4—Structures common to all cells
May 2025Paper1A ["SL"] · TZ39[ 1 ]A2.2.4—Structures common to all cells
May 2025Paper2 ["SL"] · TZ13(b)[ 2 ]A2.2.4—Structures common to all cells
Practice this objective

Coverage 2025–2025 · Updated 15 Jul 2026

Concept essentials

  • A plasma membrane encloses every cell and regulates exchange.
  • Cytoplasm supports cellular metabolism.
  • DNA stores the hereditary information of cells.
  • Ribosomes synthesize polypeptides in both prokaryotes and eukaryotes.
ConceptIB Biology SL