Lipids 1 - Triglycerides Flashcards
1
Q
Lipids
A
- Contain large amounts of carbon and hydrogen.
- Contain smaller amounts of O2
- Insoluble in H2O because they are not polar
2
Q
Three most important lipids in living things
A
Triglycerides
Phospholipids
Steroids
-> not polymers but macromolecules
3
Q
Triglyceride structure
A
Made of glycerol + fatty acids
4
Q
Glycerol
A
- has three carbon atoms
- alcohol meaning it has 3 free OH groups
5
Q
Fatty acids
A
- have a carboxyl group (COOH) on one end attached to a hydrocarbon tail (only carbon + hydrogen atoms)
- may be anything from 2-20 carbons long.
6
Q
Saturated
A
No C=C bond
7
Q
Unsaturated
A
C=C present meaning fewer H - bonds can be bonded to the molecules.
Having more than one C=C bonds changes the shape of the hydrocarbon chain giving it a kink where the double bond is.
8
Q
Functions of triglycerides
A
Energy source
Energy store
Insulation
Buoyancy
Protection
