Lipids:
composed largely of carbon and hydrogen
They are not true polymers
They are grouped together because they do not mix with water (Nonpolar)
Fats are lipids whose main function is long term energy storage
Other functions:
Insulation in higher vertebrates
"shock absorber" for internal organs
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SATURATED AND UNSATURATED PHATS
fatty acids of unsaturated fats (plant oils) contain double bonds
These prevent them from solidifying at room temperature
Saturated fats (lard) lack double bonds
They are solid at room temperature
