Lipids 1 and 2

Question 1

glycogen is more

Answer 1

branched than amylopectin: every 8-12 residues have a (1–>4) linkages

Question 2

fatty acids contain

Answer 2

a polar head (COOH) and a nonpolar tail(hydrocarbon)

Question 3

Glycerophospholipids are a major

Answer 3

major component of biological membraines

Question 4

Waxes

Answer 4

esters of long chain alcohols and long chain fatty acids

Question 5

Terpenes

Answer 5

aromatic componds in plants

Question 6

Steroids are a fused

Answer 6

fused-ring structure, cholosterol is a precusor of many hormones

Question 7

fatty acids Length ranges from

Answer 7

14-24

Question 8

Glycerophospholipds are all

Answer 8

amphiphillic

Question 9

What are the most commons in biomemmbranes in glycerophospholipids

Answer 9

Phosphatidylcholine and phosphatidylethanolamine

Question 10

sphingolipids derived from

Answer 10

sphingosine

Question 11

Cerbroside definition

Answer 11

single sugar residue

Question 12

Ganlioside

Answer 12

oligosaccharidwas with at least one sialic acid residue

Question 13

sphingomyelin is a component of

Answer 13

myelin sheath of nerve cell axons

Question 14

Sphingomyelin purpose is to

Answer 14

insulate electrical impulses

Question 15

Myelin sheath breakdown occurs in

Answer 15

multiple sclerosis patient

Question 16

cerbrosides sugar heads are receptors for

Answer 16

pituitary hormones, determinants of cell-cell recognition, receptor for bacterial toxins

Question 17

Ceramides with oligosaccharides and sialic acid has what charge

Answer 17

negative charge

Question 18

Terpenes usuaslly

Answer 18

have intense, flavor,color and order

Question 19

LDL are more

Answer 19

susceptible to oxidative damage

Question 20

Atheroscleroris are

Answer 20

damaged LDL depositied in artieries

Question 21

every low density lipoprotein transports

Answer 21

transports triacylglycerol from the liver to tissues

Question 22

Low density proteins is

Answer 22

bad chloresterol thats tranbsported from the liver to tissue

Question 22

high density lipoprotein is

Answer 22

good and is transported from tissues to liver for disposal

Question 23

Integral proteinse are tightlly

Answer 23

tightly linked to the membranes through hydrophobic interactions

Question 24

Integral proteins are seperated only

Answer 24

by agents that can disrupt membranes

Question 25

transmembrane proteins (integral proteins) are aggregated

Answer 25

in an aqueous solution

Question 26

The removal of intergal protein tends to

Answer 26

dsirupt the membrane

Question 27

Integral domains are rich in

Answer 27

a helix and b sheet structures

Question 28

Peripheral proteins dissociated

Answer 28

by simple treatment– high ionic strength or change in pH

Question 29

Peripheral proteins are solube

Answer 29

in an aqueous solutions and are easy to extract

Question 30

the removal of peripheral proteins

Answer 30

membrane intact and may be linked to other proteins

Question 31

Lipid linked proteins are present in the

Answer 31

inner leaflets of lipid bilayers

Question 32

Glycoproteins are linked to

Answer 32

carbohydrate moieties and on the outer leaflets

Question 33

What are the four types of lipid anchored membrain proteins

Answer 33

• Amide-linked myristoyl anchors
• Thioester-linked palmitoyl anchors
• Thioether-linked prenyl anchors
• Glycosyl phophatidylinositol (GPI) anchors

Question 34

In osmosis,

Answer 34

it moves from high to low

Question 35

channel protein

Answer 35

is faster than carriers and are always passive

Question 36

Ion channels are

Answer 36

passive diffusion of solutes and can have open or closed configurations