CourseCourseConceptConceptDocsDocuments

IB Biology HL B2.1.1 Lipid Bilayers As Basis Questions

Analyse how hydrophilic heads and hydrophobic tails orient in water to form closed bilayers, then identify their membrane and vesicle roles in IB Biology HL B2.1.1.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify phospholipids as amphipathic molecules with hydrophilic phosphate heads and hydrophobic fatty-acid tails.
  • Explain how phospholipids spontaneously arrange in water with heads facing aqueous surroundings and tails shielded inside a continuous closed bilayer.
  • Use membrane diagrams to identify phospholipid bilayers as the structural basis of plasma membranes, nuclei and vesicles, distinguishing them from nucleoid regions.

Learn this topic

Study B2.1.1—Lipid bilayers as basis conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL B2.1.1 Lipid Bilayers As Basis Questions question 1

[Maximum number: 2]

Outline how the amphipathic properties of phospholipids play a role in membrane structure.

All question bank results loaded