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IB Biology HL 2.1.13 Membrane Fluidity and Vesicles Question Bank

Practise IB Biology HL 2.1.13 through exact HL questions on vesicle budding, membrane fusion, endocytosis, exocytosis and intracellular transport.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse how membrane fluidity enables vesicle budding, fusion, endocytosis and exocytosis.
  • Explain how vesicles transport materials between membranes while preserving membrane continuity.
  • Use process evidence to distinguish inward vesicle formation from exocytic vesicle fusion.

B2.1.13 (HL)—Membrane fluidity and vesicles question 1

[Maximum number: 1]

Cholinergic synapses use acetylcholine as their neurotransmitter. They are widespread in the body, passing on signals to muscle cells. These synapses are affected by neonicotinoid pesticides.

The diagrams, which are not drawn to scale, show the synapse between two neurons and a detail of the synaptic cleft.

Figure for Question B2.1.13 (HL)—Membrane fluidity and vesicles question 1 — IB Biology HL

On the diagrams, label:

On the diagrams, label with a letter E a vesicle involved in exocytosis.

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