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AQA A-Level Biology Summary Notes: 3.1.3 Lipids £2.99   Add to cart

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AQA A-Level Biology Summary Notes: 3.1.3 Lipids

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Struggling to get your head around triglycerides and phospholipids? Don't worry, this document will summarise everything you need to know about them, saturated & unsaturated lipids and so much more! Read this document and you will ace the lesson on lipids! Note: these summary notes were prod...

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  • Chapter 1: biological molecules - lipids
  • October 30, 2023
  • 2
  • 2023/2024
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3.1.3 Lipids
Triglycerides
A triglyceride is a type of lipid made up of a glycerol molecule and three fatty acids. Fatty
acids have the general formula of RCOOH. The glycerol and the fatty acids join together
in a condensation reaction and they have an ester link. Triglycerides are insoluble,
meaning they can’t affect water potential.

The three golden ratios with triglycerides are:

1. High C-H bonds : Carbon ratio = makes them release a lot of energy
2. High H : O atoms ratio = release water when oxidised
3. Low mass : energy ratio = good for storage as a lot can be stored in a small volume.




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