C2 p2 slides Lipids Flashcards
largely nonpolar compounds that are insoluble in water
lipids
Lipids are composed of ?
fatty acids
fatty acid structure
carboxylic acid polar head. hydrocarbon nonpolar tail.
shorter chain length and unsaturation ? melting temperature of fatty acid
decreases
Cause kinds in hydrocarbon tails of fatty acids
cis double bonds
? fat correlates w/ heat disease
trans
Optimal fatty acid charactersitics for tight packing
long chain, few kinks
triacylglycerolstructure
fatty acid triester of glycerol. Three fatty acid chains bound to a glycerol.
fatty acids linked by ? linkage
ester
function of triacylglycerol
fatty acid storage as an energy reserve
major constituents of cell membrane
phospholipids
micelles
spheres with polar heads facing outward toward water and hydrophobic tails facing inward
phospholipid structure
fatty acids bound to two carbons of glycerol. Phosphate with hydrophilic group bond to third carbon
fatty acids form ? in water
micelles
Triglycerides form this in water
large spherical fat droplets
Phospholipids and glycolipids form this in water
bilayer
steroids are made from these subunits
ispoprenes
two common steroids
cholesterol, testosterone
most abundant steroid in animals
cholesterol
steroid that is a major component of animal membranes
cholesterol
cholesterol is a ? due to a hydroxyl group at its third carbon
sterol
combination between lipids and carbohydrates
glycolipids
glycolipid structure
carbohydrates are linked to polar head of amphipathic molecule
