Explain6 marksChallenge
The cell surface membrane of a human cell contains many glycoproteins. Using your knowledge of the fluid mosaic model, explain how these glycoproteins enable cell recognition and the initial stages of cell signalling.
CAIE A Level Biology 9700 · Cell membranes and transport
Cell membranes and transport: explain question
How this question is marked
6 marks, so the mark scheme is looking for about 6 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
More Cell membranes and transport questions
- 6 marks · A student investigated the effect of surface area to volume ratio on the rate of diffusion. They prepared agar blocks of different sizes…
- 5 marks · A student prepared three agar cubes of side lengths 1 cm, 2 cm, and 3 cm. Each cube contained a pH indicator that changes from blue to…
- 5 marks · A student investigated the water potential of potato tissue. Cylinders of potato were cut and their mass recorded. Each cylinder was…
- 7 marks · A student set up four Visking tubing bags, each containing 10 cm³ of a sucrose solution at a different concentration. Each bag was placed…
- 7 marks · A student investigates osmosis using Visking (dialysis) tubing to model a cell membrane. Three lengths of tubing are each filled with 10…
- 6 marks · A researcher prepared two types of artificial lipid bilayers: one consisting only of phospholipids, and the other containing phospholipids…
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.