Lesson 7: Lipids

Lipids
: most common long term energy storage

• insulator, protects internal organs, hormones, make up the cell membrane

• hydrophobic, made of C,H, O (no ratio)

• monomer: glycerol (not a lipid) and fatty acids

• 4 categories: fats, phospholipids, steroids, waxes

Saturated Fats
: full of H, only has single bonds

• contains carboxyl group on one side

Unsaturated Fats
: not full of H, has at least one double bond

• contains carboxyl group on one side

• Monounsaturated fat
  : one double bond

• Polyunsaturated fat
  : two or more double bonds

Glycerol
: an alcohol

Fats

• most common storage form is triglycerides

Phospholipids

• hydrophilic head composed of phosphate group + glycerol

• hydrophobic tails composed of two fatty acids

Steroids
: made of four fused hydrocarbon rings (e.g. cholesterol)

Waxes
: made of C atoms

• solid at room temperature