C11 membranes

Question 1

if torn, lipid bilayers can spontaneously form?

Answer 1

vesicles

Question 2

liposome

Answer 2

artificially prepared vesicle composed of phospholipids

Question 3

glycolipids are only located on the (interior/exterior) of the plasma membrane

Answer 3

exterior

Question 4

new phospholipids are added only to the ? side of the bilayer

Answer 4

cytoplasmic

Question 5

plasma membrane permits these two types of molecules through freely

Answer 5

small hydrophobic molecules, small uncharged polar molecules

Question 6

Four functions of plasma membrane proteins

Answer 6

transporters, linkers, receptors, enzymes

Question 7

Three ways proteins can associate with membrane

Answer 7

transmembrane, lipid-linked, protein attached

Question 8

transmembrane proteins span layer using this structure

Answer 8

alpha helix

Question 9

Can be used to disrupt membranes

Answer 9

detergents

Question 10

bacteriorhodopsin is an example of a

Answer 10

light activated proton pump

Question 11

contains firbrous proteins that contribute strength and shape to membrane

Answer 11

cell cortex. located on cytosolic side

Question 12

The exterior surface of the cell is ? rich and called the ?

Answer 12

carbohydrate, glycocalyx

Question 13

glycocalyx is involved with ?

Answer 13

cell-cell recognition. lectin proteins bind to specific carbohydrates

Question 14

Optimal phospholipid hyrdrocarbon tail for tight packing

Answer 14

long chain length , no double bonds

Question 15

cholesterol effects on membrane

Answer 15

makes stiffer and less permeable

Question 16

phospholipids tansferred to other face by this enzyme

Answer 16

flippases

Question 17

how do glycolipids only attach to outer later of membrane

Answer 17

enzymes that give glycolipids their sugar are located on the inside of the golgi. glycolipids are on interior of vesicle that leaves golgi and therefore face outside the cell when fused with membrane

Question 18

membrane proteins constitute ?% mass of animal plasma membranes

Answer 18

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