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Biology - Lipids
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Biology notes Unit 1 lipids
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-Lipids
made of
lipids : Polymer fatty acid monomers ,
they are used for structural
cell
support ,
energy storage and
signaling .
Organic Molecule ( made up of carbon
, hydrogen and
oxygen mainly )
hydrophobic ( repel water )
( have
Non polar no
charge )
-
There 3 of Lipids
main
types
are :
lo
Triglycerides : Made up of one
glycerol and three
fatty acids .
Function of ( insulation)
storage
:
-
energy ,
Features : .
insolvable in water so
they do not affect the water
-
potential in the cell ( does not cause osmosis ) .
Forms insolvable tails inside
droplets hydrophobic the
•
on .
,
- Glycerol :
fatty acids : ( R)
H
O
-
i
H H H H H
H C OH
11
- -
-
! & & & &
'
H -
c
oh r Ho C -
c - - - - -
H
(Triglyceride
- -
H -
c -
oh
H H H H H
I
H
form
•
The
Glycerol and
fatty acids
reaction
an ESTER bond in
condeonsation
a .
H
l l
H d C -
R
①
-
-
-
o
t O
H -
c -
o -
I -
R (ester bonds ) t 3 H2O
,
H c
o R
- -
-
C -
l
l l
H O
The ( )
fatty acids can be saturated c c or
c. -
un -
saturated ( GC ) .
°
When
triglycerides are broken down ( hydrolysis )
the
fatty acids will be released and lower the pH of the
solution
they are in .
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