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Lipids - Coggle Diagram
Lipids
Triglycerides
formed through combination
glycerol + fatty acids
fatty
acids
organic acids
form long hydrocarbon tails
linked to carboxyl group (-COOH)
different fatty acids
=
different length of chains
Bonding
1 glycerol joined
with 3 fatty acids
3 condensation
reactions
Between
-OH group
of glycerol +
carboxyl group
each fatty acid
ester bond
formed
Hydrolysis
happens during
lipid digestion
3 molecules water
produced
3 fatty acids +
one glycerol produced
Roles
protection
energy store
insulation
Phospholipids
1 fatty acid molecules
replaced by phosphate group
fatty acid
repels water + insoluble
water
form hydrophobic tails
phosphate
glycerol head hydrophilic
polar molecules
cell membrane contain
steroid cholesterol
(hydrophobic)
located among
hydrocarbon chain +
phospholipid bilayer
properties determine
orientation + function
cell membrane
Properties
Non
Polar
Hydrophobic
not soluble
in water
soluble in organic solvents
(ether + ethanol)
not polymers
but form large molecules
(macromolecules)
Differences between
FATS + OILS
both triglycerides
(chemically v similar)
FATS
products of
animals
solid @ room
temperature
saturated
OILS
products of
plants
unsaturated
unsaturated
Unsaturated +
Saturated Fatty
Acids
saturated
contains
max no.
H atoms
C-C single
bonds
unsaturated
at least 1 C=C
double bond
not have max
no. H atoms
monounsaturated
only 1 C=C
double bond
oleic
acid
polyunsaturated
more than 1
C=C double bond
linoleic acid
Organic Molecules
contain carbon, hydrogen +
oxygen - but ratio H:O much
greater than carbs
Waxes
+
Steroids
