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4 marksMembrane Structure and Function

CAPE Biology Unit 1 · 2013 · Paper 2 · Question 4(a)

Define the term 'diffusion', and distinguish between active transport and facilitated diffusion in cells.

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  1. 4(b)(i)With the aid of a simplified labelled diagram, describe the fluid mosaic model of membrane structure.[6 marks]
  2. 4(b)(ii)With reference to the fluid mosaic model, discuss how polar molecules and ions are transported.[5 marks]

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