Lipids Flashcards
as carbon length increases…
melting point also increases
the greater the unsaturated FA chains…
the greater the reduction of the melting point
long chain saturated fatty acid is ____ at room temperature
solid
example of long saturated FA
margarine, butter
long chain unsaturated fatty acid is _____ at room temperature
liquid
example of long unsaturated FA
vegetable oil
corn oil
olive oil
organic compounds in living organisms that are insoluble in water but soluble in nonpolar organic solvents
LIPIDS
solvents that lipids dissolve in
benzene
chloroform
ether
elements found in lipids
CHO - carbon, hydrogen, oxygen
what are the smallest molecules that make lipids?
glycerol
3 fatty acids
glycerol composition
3 carbons
3 OH-groups
any molecules with carboxyl group (-COOH) are considered _____.
acids
acids w/ very long hydrocarbon chains attached
fatty acids
what kind of reaction creates triglyceride lipid?
triple condensation bond
what holds together triglyceride lipid?
3 esther bonds
triglyceride lipid composition
3 fatty acids + glycerol
FAtty Acid characteristics
- unbranched carbon chain
- even number of carbon atoms in carbon chain
- cis configuration double bonds
cis configuration
acyl chains are on same side of bond
trans configuration
acyl chains are on opposite side of bond
example of trans configuration
elaidic acid - remains straight - due to presence of acyl chains on opposite side of bond
hydrogenation of fatty acids produce _____.
trans fatty acids
what is the effect of frequent use of the same oil when cooking?
accumulation of trans fatty acids in oil due to hydrogenation (addition of H2O)
trans FAs increase risk of
CVD and DM
normal recommended DAILY dietary intake of carbs, fats, proteins,
saturated, transfat
above 50% - carbs
30-35% - fats
10-15% - proteins
combined saturated and transfat MUST be less than 10%
short chain FA
C4-C6
MEDIUM CHAIN FA
C8-C10
LONG CHAIN FA
C12-C26
examples of simple FAs
neutral fats, oils
waxes - lanolin, beeswax,carnauba, sperm whale oil, synthetic spermaceti