lipids

Question 1

what is a lipid

Answer 1

biological molecules soluble in organic solvents.

they make up fats and oils

Question 2

what are lipid functions

Answer 2

structural element of membranes
energy reserve (fat)
vitamins and hormones

Question 3

how to lipids behave in water

Answer 3

monolayer in water - hydrophilic head in water tail out
forms a micelle when stirred - tails on inside
bilayer in membrane

Question 4

what are the categories of lipids

Answer 4

fatty acids
triacylglycerols
phospholipids - phosphoglycerides, sphingolipids
glycosphingolipids
cholesterol

Question 5

describe fatty acids

Answer 5

hydrocarbon chain, carboxylic acid group
unsaturated - double bonds, kinks

transported in blood by albumin

Question 6

describe triacylglycerol

Answer 6

3 fatty acids, 1 glycerol
major storage in cytoplasm
it globs in adipose cells
energy reserves

Question 7

describe phospholipids

Answer 7

phosphoglycerides-
most of membrane in mammals,bacteria and plants
glycerol backbone, 2 fatty acids, a phosphate w/ alcohol
named by adding onto phosphatidyl

sphingolipids -
backbone is sphingosine, unsaturated
in brain and nervous tissue

Question 8

describe glycosphingolipids

Answer 8

sphingosine attached to sugar molecule

a ganglioside has 7 sugars

Question 9

decribe cholesterol

Answer 9

steroids - provides rigidity in membranes