Triglycerides
- Created by: KateL18
- Created on: 08-04-19 13:46
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- Triglycerides
- lipid
- insoluble in water because not polar
- do dissolve in alcohol
- glycerol
- 3 carbons
- an alcohol so has 3 free -OH groups
- fatty acids
- carboxyl group (-COOH)
- attached to hydrocarbon tail
- carboxyl group ionises into H+ and -COO- group
- so acid because produces free H+ ions
- if saturated, no C=C bonds in molecule
- if unsaturated, C=C= fewer hydrogen atoms bonded
- C=C means a kink so more fluid (in animals)
- if unsaturated, C=C= fewer hydrogen atoms bonded
- carboxyl group (-COOH)
- ester bonds
- condensation reaction between -COOH group of fatty acid and -OH group of glycerol
- water molecule produced
- covalent bond
- functions
- energy source
- broken down in respiration (generate ATP)
- energy store
- store without affecting water potential of cells
- mammals store fate under skin
- insulation
- buoyancy
- protection
- energy source
- lipid
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