Lipids
- Created by: farahh24
- Created on: 12-09-18 12:56
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- Lipids
- Triglycerides
- One glycerol molecules attached to three fatty acid molecules.
- Phospholipids
- Modified triglycerides and contain the element phosphorous along with carbon, hydrogen and oxygen.
- Phosphate ions have extra electrons and are negatively charged, making them soluble.
- Sterols
- Also known as steroid alcohols.
- E.g. cholesterol.
- Role of lipids
- Emulsion test
- Triglycerides
- Fatty acid
- Glycerol
- Fatty acid
- Fatty acid
- Glycerol
- Fatty acids are carboxyl acids that end in (COOH)
- In esterification reaction of triglycerides, three water molecules are produced.
- In hydrolysis reaction of triglycerides, three water molecules need to be added.
- Saturated v unsaturated
- Saturated: No double bonds between carbon atoms.
- More compact, solid at room temperature
- Unsaturated: Double bonds between carbon atoms.
- Less compact, liquid at room temperature.
- Saturated: No double bonds between carbon atoms.
- Phosphate
- Fatty acid
- Fatty acid
- Hydrophilic head, hydrophobic tail.
- Have little in common with fats and oils structurally.
- Complex alcohol molecules, based on four carbon ring structure.
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