1. Chemistry of Life
Biology – S1

2. Video: http://viewpure.com/VGHD9e3yRIU Lipids
mostly non-polar (hydrophobic)
oils are a type of fat made from glycerol and fatty acids
greasy and oily to the touch
used for stored energy 9cal/gram.
3 functions of lipids:
store energy – (adipose tissue slide)
Very Fat Bear

3. build membranes- cellular
chemical messengers- myelin sheath around nerve cell

4. Triglycerides: means fat
3 fatty acids (tri) bonded to a glycerol
Unsaturated: fatty acids with double bonds
liquid at room temperature
kinks in structure prevent solidification
corn oil, olive oil, vegetable oil, most plant fats
Saturated: fats with the maximum number of hydrogen
most animal fats, butter, lard
solids at room temp
“HYDORGENATED VEGETABLE
OILS” (AKA Trans fat)
(margarine) unsaturated fats
that have been converted to
saturated fats by adding
Hydrogen
Break down HDL and raises LDL
Heart disease will follow

5. Waxes
one fatty acid linked to an alcohol
firm and repel water (hydrophobic)
Cutin: makes up most of the cuticles that cover plant parts
Birds: wax secretions help keep feathers dry
Lanolin: wax found in wool
Carnauba wax: wax from palm leaves

6. Phospholipids- structurally similar to fats but also contain a phosphorus and only have two fatty acid chains instead of three
major component of cell membranes- tail is hydrophobic and the head is hydrophilic
Head
Tail