Lipids
Lipids mindmap-spaces left for molecules of diagrams :)
- Created by: Samantha
- Created on: 20-01-13 19:44
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- Lipids
- Purpose: energy store; protection; insulation; source of energy; phospholipids in membranes; cholesterol in membranes; and hormones.
- A lipid is a group of organic compounds whose molecules contain atoms of carbon, hydrogen and oxygen only.
- Much more hydrogen than carbohydrates
- Some lipids produced by body, some taken in by diet-essential.
- Non-polar
- Glycerol
- Soluble in water; produces triglycerides; polar OH group allows it to be soluble.
- Fatty Acids
- Acid group remains the same in all. Made up of acid group and hydrocarbon chain. Chain can vary in length from 2 to 20 carbons.
- Saturated Fats
- All possible bonds made with hydrogen; all single bonds except acid group; excess is bad for health; usually animal fats.
- Unsaturated Fats
- Not all hydrogen bonds formed leading to some double bonds; monounsaturated=one double bond; polyunsaturated=two or more double bonds; plants are main source (and fish)
- Triglycerides
- Formed when 3 fatty acids are attached to one molecule of glycerol; condensation; three water molecules released; ester bonds produced.
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