Fats & Lipids Flashcards
1
Q
describe properties of lipids
A
insoluble in water soluble in organic solvents/alcohols contain: carbon, hydrogen and oxygen proportionally more carbon than oxygen occasionally have other elements -> e.g. phosphorus
2
Q
what are the diff. groups of lipids?
A
- fats (solid) + oils (liquid)
- steroids & terpenes -> (incl. some vitamins)
- waxes -> e.g. waxy leaf cuticle
- fatty acids
- diglycerides
- triglycerides
3
Q
why do fatty acids have no chemical formula?
A
they’re a variation
4
Q
what state is fat at room temp.?
A
solid
5
Q
what state is oil at room temp.?
A
liquid
6
Q
chemical formula for glycerol?
A
C3H8O3
7
Q
what makes up a triglyceride?
A
glycerol + 3 fatty acids
bonded by ester linkages
8
Q
describe the structure of fatty acids
A
- COOH (carboxyl group)
- hydrocarbon chain
- CH3 (methyl group)
9
Q
general formula for lipids?
A
COOH (CH2)n CH3
10
Q
define saturated in terms of bonds
A
single bonds
11
Q
define unsaturated in terms of bonds
A
double bonds
12
Q
describe an ester linkage
A
O - C = O
13
Q
CHECK NOTES FOR DIAGRAMS FOR SATURATED AND UNSATURATED BONDS
A
*
14
Q
how are fat molecules held together?
A
by ester linkages
15
Q
what makes up a diglyceride?
A
glycerol + 2 fatty acids
bonded by ester linkages
