biochem: lipid types

Question 1

3 subclasses of sphingolipids

Answer 1

1. sphingomyelin
2. glycosphingolipids
3. gangliosides

Question 2

what is triacylglyceride made of

Answer 2

glycerol + 3 fatty acids

(has 3 oh, dehydrated to attach fatty acids_

Question 3

properties of triacylglycerols (mp, function, etc)

Answer 3

mp varies- length up= mp up
more unsat= mp down

most abundant form of lipids

energy storage (since highly reduced can use to make nadh adh for atp)

insulation (seals, skin)

buoyancy (whales)

Question 4

triacylglycerols soap example

Answer 4

fatty acids form micelles in water and can carry oil in their interiors and still be soluble in water

breaks fat layer (how soap wash away greese)

Question 5

ceramide

Answer 5

when fatty acid attached to sphingosine via amide linkage

Question 6

glycosphingolipids

Answer 6

outer face of plasma
for identification

Question 7

glycosphingolipids: cerebrodises

Answer 7

head group= 1 sugar unit linked to ceramide, no charge

Question 8

glycosphingolipids: globosides

Answer 8

head group= more than 1 sugar unit, no charge

Question 9

gangliosides

Answer 9

negative charge, most complex,

has oligosaccharides (bulky) as their polar head groups, one or more residues of neusAc (N acetylneuraminic acid)