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Summary

Summary Chapter 4 - Transport across cell membranes

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A summary with all the key definitions, colourful diagrams and clearly outlined concepts you'll need to easily revise and thrive in A level Biology. On each page of this summary, there are diagrams to illustrate hard-to-imagine concepts needed to keep your interest and concentration on the topic at hand. Happy studying!

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Institution
AQA
Module
Unit 2 - Cells









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Connected book

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Glenn Toole, Susan Toole AQA Biology A Level Year 2 Student Book
  • januari 2015
  • 9780198351764
  • 1

Written for

Study Level
A/AS Level
Examinator
AQA
Subject
A Level Biology
Unit
Unit 2 - Cells
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Document information

Summarized whole book?
No
Which chapters are summarized?
Chapter 4
Uploaded on
March 14, 2023
Number of pages
10
Written in
2022/2023
Type
Summary

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Content preview

Transport in cells
Across cell membranes

, Phospholipid bilayer
• Phospholipids have hydrophilic heads and
hydrophobic tails
• Hydrophilic heads point outwards, attracted
water on both sides
• Hydrophobic tails point inwards, repelled by
the water on both sides
• Allows lipid-soluble substances to enter and
exit but not water-soluble substances
• Membrane is flexible and self-sealing (it can
join up to itself easily)

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