C11 membranes Flashcards Preview

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Flashcards in C11 membranes Deck (18):
1

if torn, lipid bilayers can spontaneously form?

vesicles

2

liposome

artificially prepared vesicle composed of phospholipids

3

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

exterior

4

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

cytoplasmic

5

plasma membrane permits these two types of molecules through freely

small hydrophobic molecules, small uncharged polar molecules

6

Four functions of plasma membrane proteins

transporters, linkers, receptors, enzymes

7

Three ways proteins can associate with membrane

transmembrane, lipid-linked, protein attached

8

transmembrane proteins span layer using this structure

alpha helix

9

Can be used to disrupt membranes

detergents

10

bacteriorhodopsin is an example of a

light activated proton pump

11

contains firbrous proteins that contribute strength and shape to membrane

cell cortex. located on cytosolic side

12

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

carbohydrate, glycocalyx

13

glycocalyx is involved with ?

cell-cell recognition. lectin proteins bind to specific carbohydrates

14

Optimal phospholipid hyrdrocarbon tail for tight packing

long chain length , no double bonds

15

cholesterol effects on membrane

makes stiffer and less permeable

16

phospholipids tansferred to other face by this enzyme

flippases

17

how do glycolipids only attach to outer later of membrane

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

18

membrane proteins constitute ?% mass of animal plasma membranes

50