Lipids

Macromolecules that are nonpolar and organic. Do not dissolve in water.

Lipids

These molecules have large numver of carbon-hydrogen bonds that store large amounts of energy.

Lipids

unbranched carbon chain that make up lipids

fatty acids

COOH, attached at one end of a fatty acid

Carboxyl group

water loving

hydrophilic

attached at the other end of a fatty acid

hydrocarbon

hydrocarbons are

nonpolar

water fearing

hydrophobic

hydrocarbon chain that has each carbon atom bonded to 4 atoms

saturated fatty acids

hydrocarbon chain that has each carbon aton bonded to less than 4 atoms

unsaturated fatty acids

composed of three fatty acids joined to an alcohol molecule called glycerol by a condensation reaction

triglyceride

animal fats, high melting points

saturated triglyceride

plant oils, low melting points

unsaturated triglycerides

composed of two fatty acids joined to a molecule of glycerol by condensation reaction

phospholipid

composed of two layers of phospholipids (phospholipid bilayer)

cell membranes

Cell membrane won't

dissolve in water

Cell membrane holds

the content of a cell together

composed of a long fatty acid chain joined to a long alcohol chain by a condensation reaction

wax

____ are water proof, enabling plants to survive by water retention

waxes

these are composed of 4 fused carbon rings with various functional groups attached to them

steroids

testosterone and estrogen

hormones

used in nerve and cell function

cholestrol