A-LevelBiologyCell membranes and transport9700/12 · May/June 2020 · Q151 Mark
The diagram shows the fluid mosaic model of membrane structure. Structures 1, 2, 3 and 4 are types of molecule. [Figure 15.1] Which types of molecules are always identical?
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A1, 2 and 3
B1 and 4
C2 and 3 only
D4 only
✓ Correct answer
D: 4 only
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