Fatty Acid
• A fatty acid is nothing
more than a long C-H
chain with a carboxyl
group (COOH) on the
end.
• The COOH gives it an
acid property.
• The 3….dots represent
the chain is very long.
Glycerol
• Glycerol Always looks
the same
• 3 C’s with 3 OH’s and
everything else H’s.
To build one lipid molecule, we combine
3 Fatty acids with 1 glycerol by the
process of ?
What’s What?
• Identify the glycerol
molecule
• The fatty acids
Fats make up most of the cell
membrane
• Remember fats have
a hydrophilic head
and a hydrophobic
tail.
Fats are used as an insulator
• Fats help keep
animals warm
Energy
• Fats have a lot of energy
stored up in their bonds.
• That’s why the human
body stores fats as an
energy source.
• When your body needs
extra fuel, your body
breaks down the fat and
uses it as energy.
• Sugar give you only a
little bit of energy
• Fat molecules give off
much more energy.
Who’s got the power?
• Sugar
• Fatt
Saturated and Unsaturated fats
• There are two kinds
of fats saturated and
unsaturated
• Unsaturated fats have
at least one double
bond (C=C) in one of
the fatty acids
• Saturated fats have
no double bonds.
(C-C)
Steroids
• Steroids are lipids
• Since they are lipids
they can cross the
cell membrane
• Are hormones
• Have a 4 ring
structure
Steroid Abuse
• Many body builders
and athletes use
steroids.
• They are destroying
their internal organs
• Cause liver and
kidney damage
Waxes
• Waxes are used to coat and protect things
in nature.
• Your ears make wax
• Plant leaves make waxes to stop
evaporation.
Element Present
Used by
organisms
Related terms& Info
Carbon ©
Hydrogen (H)
Oxygen (O)
Only!
There is no
specific H:O ratio
Stored Energy
Structure
(important part of
cell membranes)
Saturated fat = C-C bonds
are all single
Building blocks Fatty acid:
of lipids
Glycerol:
Unsaturated fat = Contain
at least one double bond
C=C.
Is this dehydration synthesis or
Hydrolysis?
• Lipid + water  3 fatty acids + glycerol
Don’t forget to finish your lab!
The Mad Scientist