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Summary - Unit 1 - Biological molecules
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This summary of what you need to know on the subunit lipids in unit 1. key terms and information you can use in your exams hope you get good marks and getting a better understanding. These have been clearly annotated with drawing and pictures to help those who are visual learners or any type of stu...

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Document information

  • October 9, 2023
  • 3
  • 2023/2024
  • Summary

Subjects

  • triglyceride
  • glycerol
  • fatty acids
  • a level biology
  • unsaturated and saturated fats and oils

Written for

  • A/AS Level
  • AQA
  • A Level Biology
  • Unit 1 - Biological molecules
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Lipids are mixed groups of hydrophobic, compounds composed of carbon hydrogen
and oxygen. The main complex lipid types are triglycerides and phospholipids.
Hydrophobic compound: a compound/substance, composed of non--polar molecules that
repel bodies of water a and attracts other neutral molecules as no service. I.e. oils and fats
do not mix in water.
Hydrophilic: water bonding, polar molecules, water, soluble, bracket, not soluble in lipids).
Polar compounds that have ionic groups. The polar nature of these compounds enable them
to readily absorb water polo service to eventually be resolved in this policy. I.e. like water.


Lipids classification




Type your text



Emulsion test for lipids




Triglycedride formation

Called fatty acids or oils
Made up of one molecule of glycerol and 3 fatty acids.
Glycerol Is a small 3-carbon molecule with 3 alcohol groups(C3H8O3)

The properties depends on nature of fatty acids.

Insoluble in water
Used for storage, insulation of fatty tissue around the organs, waterproofing and controls the
flexibilty of the cell memebrane.
Yeild more energy per unit mass, so good for storage.

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