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IB Biology HL B1.1.12 Phospholipid Bilayers Questions

Practise IB Biology HL B1.1.12 by relating hydrophilic phosphate heads and hydrophobic tails to phospholipid arrangement in water and stable cell membranes.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify the hydrophilic phosphate heads and hydrophobic tails that make phospholipids amphipathic.
  • Explain how phospholipid tails turn away from water in monolayers or bilayers that form stable membrane barriers.

IB Biology HL B1.1.12 Phospholipid Bilayers Questions question 1

[Maximum number: 1]

Which features of phospholipids give them their amphipathic properties?

A

Basic phosphate groups and acidic lipids

B

Acidic phosphate groups and basic lipids

C

Hydrophobic phosphate groups and hydrophilic fatty acids

D

Hydrophilic phosphate groups and hydrophobic fatty acids

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