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.

Exam points

Identify cholesterol as an animal-cell membrane component located between phospholipids that regulates membrane fluidity.
Explain how cholesterol prevents excessive fluidity at high temperature and stiffening or crystallization at low temperature.
Relate cholesterol to reduced permeability for some substances and overall membrane stability.

[Maximum number: 1]

State the role of cholesterol in animal cell membranes.

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