Lipids Flashcards
1
Q
What are lipids?
A
They are
2
Q
What are the general characteristics of lipids?
A
- Nonpolar
- Hydrophobic
- Insoluble in water, soluble in organic solvents
3
Q
What are lipids made of?
A
- Glycerol and fatty acids
4
Q
Difference between unsaturated and saturated fatty acids.
A
Number of C=C double bonds:
* Unsaturated have C=C double bonds, creates kink
* Saturated do not have C=C double bonds, no kink
The greater the no. of C=C double bonds, greater the number of kinks in hydrocarbon tails of molecule, weaker intermolecular interactions between fatty acid molecules, smaller amount of energy required to weaken those hydrophobic interactions, lower melting point.
5
Q
How is a phospholipid molecule formed?
A
One glycerol, two fatty acids and a phosphate group.
6
Q
A
