LIPIDS AND MEMBRANES Flashcards
1
Q
what are fatty acids found in?
A
- triacyl glycerides
- phospholipids
- sphingolipids
- glycolipids
2
Q
what are fatty acids?
A
- carboxylic acids
3
Q
what are saturated fatty acids?
A
have only single C-C bonds
4
Q
what are unsaturated fatty acids
A
have C=C double bonds.
5
Q
what are monounsaturated fatty acids?
A
have one C=C double bond
6
Q
what are polyunsaturated fatty acids?
A
have multiple C=C double
bonds
7
Q
what are omega nomenclature numbers?
A
numbers from terminal end of the tail.
8
Q
what are delta nomenclature numbers?
A
numbers from the head of a tail.
9
Q
melting temperatures of fatty acids?
A
- longer chain = higher melting temperature
- unsaturation decreases melting temperature.
10
Q
what are ethers?
A
- have membranes composed of monolayers of double - headed isoprenois ether lipids.
- ether linkages are stronger than ester linkages and cannot be hydrolysed.
11
Q
what are triglycerides?
A
- used as energy store
- used for padding and insulation
- ester linkages between glycerol and 3 fatty acids
12
Q
what is a phospholipid bilayer?
A
- hyrophillic heads
- hydrophobic tails in core
- has plasma membrane
13
Q
what is the fluid mosaic model?
A
- membrane proteins can span the membrane (intrinsic proteins)
- membrane associated proteins can sit on the membrane
14
Q
membrane fuidity?
A
- more unsaturated fatty acids = more fluid membrane
- cholesterol makes membrane less fluid
