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IB Biology HL 2.1.12 Cholesterol and Membrane Fluidity Question Bank

Practise IB Biology HL 2.1.12 through exact HL questions on cholesterol placement, fluidity buffering, membrane stability and permeability.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse how cholesterol buffers membrane fluidity and permeability across different temperature conditions.
  • Explain the hydrophobic placement of cholesterol and its effects within the phospholipid bilayer.
  • Use membrane evidence to justify cholesterol as a regulator rather than a transport channel.

B2.1.12 (HL)—Cholesterol and fluidity question 1

[Maximum number: 1]

State the role of cholesterol in animal cell membranes.

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