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CAIE A Level Biology 9700 · Cell membranes and transport

Cell membranes and transport: outline question

Outline5 marksStandard

The cell surface membrane of an animal cell is described by the fluid mosaic model. Outline the key features of this model, including:

  • how the phospholipid bilayer is formed by hydrophobic and hydrophilic interactions
  • the roles of cholesterol, glycolipids, and glycoproteins
  • the main stages of cell signalling across the membrane
0 words · 5 marks

No account needed for your first marks. Your answer is used only to mark it.

How this question is marked

5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.

Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.

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