Describe4 marksStandard
The table below lists four components of a cell surface membrane. Describe the role of each component in the membrane.
| Component | Role |
|---|---|
| Phospholipid | |
| Cholesterol | |
| Glycoprotein | |
| Channel protein |
CAIE A Level Biology 9700 · Cell membranes and transport
Cell membranes and transport: describe question
How this question is marked
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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