5 marksMembrane Structure and Function

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

With reference to the fluid mosaic model, discuss how polar molecules and ions are transported.

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4(a)Define the term 'diffusion', and distinguish between active transport and facilitated diffusion in cells.[4 marks]
4(b)(i)With the aid of a simplified labelled diagram, describe the fluid mosaic model of membrane structure.[6 marks]

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