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IB Biology HL B2.1.12 Hl Cholesterol and Fluidity Questions

Analyse how cholesterol between phospholipids stabilizes membrane fluidity across temperatures and reduces permeability to some substances in IB Biology HL B2.1.12.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify cholesterol as a membrane component that regulates membrane fluidity.
  • Explain how cholesterol prevents membranes becoming too fluid at high temperatures and stiffening or solidifying at low temperatures.
  • State that cholesterol reduces membrane permeability to some substances.

IB Biology HL B2.1.12 Hl Cholesterol and Fluidity Questions question 1

[Maximum number: 1]

State the role of cholesterol in animal cell membranes.

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