Paper 2 style question on topic 1.3 Membrane structure
Use the buttons to review the topic, try a paper 2 style question and check your answer.1.3 
Membrane structure
- Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules.
- Membrane proteins are diverse in terms of structure, position in the membrane and function.
- Cholesterol is a component of animal cell membranes.
- Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport.
- Application: Cholesterol in mammalian membranes reduces membrane fluidity and permeability to some solutes.
- Can you draw a diagram of the fluid mosaic model?
- Can you explain how evidence from electron microscopy led to the proposal of the Davson-Danielli model?
- Can you outline the evidence which led to the falsification of the Davson-Danielli model and support of the Singer-Nicolson model?
Skills
- Application: Cholesterol in mammalian membranes reduces membrane fluidity and permeability to some solutes.
- Skill: Drawing of the fluid mosaic model.
- Skill: Analysis of evidence from electron microscopy that led to the proposal of the Davson-Danielli model.
- Skill: Analysis of the falsification of the Davson-Danielli model that led to the Singer-Nicolson model.