B2.2.9 (HL)—Vesicles in cells
Vesicles transport proteins and other cargo between organelles, the plasma membrane, and extracellular space during secretion, uptake, and intracellular delivery.
- Syllabus
- First assessment 2025
- Objective
- B2.2.9
- Level
- HL
Exam analysis
Chance of appearing2%of analysed past papers
Latest appearanceMay 2025
Most common paperPaper1
Typical marks1
Common command terms
- Identify
Scoring notes
- Common mistake
- Putting the Golgi apparatus before rough ER in the protein export route.
Recent exam appearances
May 2025Paper1A ["HL"] · TZ215[ 1 ]B2.2.9 (HL)—Vesicles in cells
May 2017Paper1 ["HL"] · TZ23[ 1 ]B2.2.9 (HL)—Vesicles in cells
Practice this objective
Coverage 2017–2025 · Updated 15 Jul 2026
Concept essentials
- Protein export commonly follows rough ER to Golgi apparatus to plasma membrane.
- Secretory vesicles can move enzymes out of cells by exocytosis.
- Clathrin helps membranes indent during coated vesicle formation.
- Vesicles link organelles, membranes, and extracellular release pathways.