Lipids: Fats, Oils & Waxes

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Lipids: Fats, Oils & Waxes
• Large and varied group
• Made up of mostly C & H atoms (O
too!)
• Do not dissolve in water
• Uses:
–
–
–
–
Energy Storage
Waterproofing
Structure
Hormones
Triglycerides
• function to cushion organs, as
insulation & in long-term
energy storage
• Made of two kinds of
molecules
– Glycerol
– Fatty acids
• Saturated Fatty Acid:
– Carbons joined by single bonds
– Maximum H atoms
• Unsaturated Fatty Acid:
– At least one double bond
between carbons in the fatty acid
Fatty Acids
Fatty acids
that contain 1
or more
double bonds
between
carbon
atoms are
said to be
unsaturated.
Fatty acids
with only
single
covalent
bonds
between the
carbon
atoms are
referred to
as saturated.
What are Trans fats?
Source: http://biology.clc.uc.edu/Courses/bio104/lipids.htm
Phospholipids
• Building block of cell membrane
– Only has 2 fatty acids
– 1 phosphate group
• Have
– Hydrophilic heads
– Hydrophobic tails
Steroids
• Carbon Skeleton has:
– Four interconnected rings
– Different groupings of atoms (or
functional groups) attached
• Cholesterol
• Hormones

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