IB Biology SL B2.1.1 Lipid Bilayers As Basis Questions
Explain how phospholipid heads and tails orient in water, then identify bilayers in plasma membranes, vesicles and nuclear envelopes.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Identify phospholipids as amphipathic molecules with hydrophilic phosphate heads and hydrophobic fatty-acid tails.
- Explain how phospholipids form a continuous, closed bilayer in water, with hydrophilic heads facing water and hydrophobic tails directed inwards.
- Identify phospholipid bilayers in plasma membranes, vesicles and nuclear envelopes, and distinguish them from a nucleoid.
IB Biology SL B2.1.1 Lipid Bilayers As Basis Questions question 1
The diagram shows the stages of the cell cycle.
Explain the properties of phospholipids that allow bilayers to form in cell membranes.
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