Lipids Flashcards
1
Q
Lipids
A
- Insoluble in water
- Fats consist of complex polymer of fatty acid attached to glycerol
- Many lipids consist of a glycerol molecule with three fatty acids attached
o Commonly called a triglyceride
2
Q
- Saturated
A
o Internal carbon atoms in fatty acid chain are bonded to two hydrogen atoms
Maximum hydrogen atoms possible
o Solid at room temperature
3
Q
- Unsaturated
A
o Fewer hydrogen atoms
4
Q
- Monounsaturated
A
o One double bond
5
Q
- Polyunsaturated
A
o More than one double bond
o Low melting point
6
Q
- Terpenes
A
o Long-chain lipids
Pigments such as chlorophyl
7
Q
- Steroids
A
o Four carbon rings
8
Q
- Prostaglandins
A
o 20 lipids
Modified fatty acids with two nonpolar tails attached to a 5-carbon ring
Local chemical messenger
9
Q
- Fats are excellent energy-storage molecules
A
- Most fats produced by animals are saturated
o Plants unsaturated
10
Q
- Phospholipids
A
o Complex lipid molecules
Most important molecules of the cell
11
Q
o 3 subunits
A
Glycerol • Backbone of the phospholipid molecule Fatty acid • Two fatty acids are attached to the glycerol backbone Phosphate group • Attached at one end of the glycerol
