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Last Updated Sep 27, 2025
Lipids (Fats & Oils) Simplified Revision Notes for Leaving Cert Biology
Revision notes with simplified explanations to understand Lipids (Fats & Oils) quickly and effectively.
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Lipids (Fats & Oils)
Lipids are composed of:
- Carbon
- Hydrogen
- Oxygen
The basic unit is a triglyceride.
A triglyceride consists of:
- One glycerol
- Three fatty acids You may be asked to draw a triglyceride:
A phospholipid consists of:
- One glycerol
- Two fatty acids
- One phosphate
Fats are solid at room temperature.
Oils are liquid at room temperature.
Role of lipids
- Formation of cell membranes (phospholipids)
- Heat and energy
- Formation of adipose tissue beneath the skin (insulation)
- Form a protective layer around delicate organs
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