Lipids: Fats & Oils

2003-2004

Lipids

2003-2004

Large biomolecules that are made mostly

of carbon and hydrogen with a small

amount of oxygen (sometimes

Phosphorous).

Lipids

Monomer subunits Glycerol and 3 fatty acids

• Examples

fats

oils

Waxes2003-2004

Lipids

Function:Stores energy

very concentrated (pure)2 times as much as carbohydrates

Cell membraneForms protection (ex. Waterproofing) insulates body

Structure of Fat

2003-2004

not a chain (polymer) = just a “big fat molecule”

Lipids ExamplesSteroids-structure is a series of connected hexagonal rings. Cholesterol, hormone, cortizone.

Triglyceride- glycerol with 3 fatty acids; fats in food, associated with cholesterol.

Phospholipid- glycerol with 2 fatty acids; make up cell lipid bilayer membrane.

Fats: insulates, stores energy, solid at room temperture

Oils- liquid at room temp.

Saturated fatsMost animal fats

solid at room temperature

Limit the amount in your diet

contributes to heart disease deposits in arteries

2003-2004

Unsaturated fatsPlant, vegetable & fish fats

liquid at room temperature

the fat molecules don’t stack tightlytogether

Better choice in your diet

2003-2004

Test for LipidsBrown paper bag test