Biochem Test 2

Front 1

What are four different forms of lipid association

Back 1

1. micelle
2. bilayer
3. polar head hydrophobic tail
4. liposome or vessicle

Front 2

Name the four characteristics of the fluid mosaic model

Back 2

1. Discontinuous bilayer
2. Fluidity
3. Movement
4. Assymetry

Front 3

Define Discontinuous bilayer of fluid mosaic model

Back 3

The lipid bilayer has islands of integral proteins penetrating partially or completely through the bilayer

Front 4

Define fluidity

Back 4

Membranes may vary from an immobile gel to liquid form with a characteristic transition temperature which is dependent upon lipid comosition

Front 5

What determines the transition temperature in fluid mosaic model

Back 5

Dependent upon lipid composition

Front 6

______ fatty acids, with characteristic ______ in the chain make for greater fluidity.

Back 6

cis-unsaturated
bends

Front 7

How does cholestrol affect fluidity or rigidity of fluid mosaic model

Back 7

Cholestrol tends to modify the extremes

Front 8

Describe the "movement" of fluid mosaic model?

Back 8

Lots of lateral or translational movement which is quick (minutes) but transverse movement or flipflopping between the inner and outer parts of the bilayer are less frequent (takes days or weeks)

Front 9

How do proteins compare to lipids as far as movement is concerned

Back 9

Proteins move less laterally and have little or no flip-flopping

Front 10

What does assymetry refer to in fluid mosaic model

Back 10

Assymetrically distributed with respect to the inner and outer layers