Phospholipid Membrane Model

Question 1

Phospholipid head

Answer 1

Hydrophilic polar

Question 2

Phospholipid fail

Answer 2

Hydrophobic non-polar

Question 3

Polar molecules

Answer 3

Channel protein- facilitated diffusion

Question 4

Intrinsic proteins

Answer 4

Polar ends and non-polar centre- spans the whole width of the membrane

Question 5

Extrinsic

Answer 5

Only polar- sits of polar phospholipid heads only on outside
Act as receptors
Cell signals
Cellular reactions (move into cytoplasm)

Question 6

Cholesterol

Answer 6

Controls membrane fluidity

Question 7

More cholesterol

Answer 7

Lower fluidity and permeability of the cell me membrane

Question 8

Cholesterol is only found in

Answer 8

Animal membrane

Question 9

Glycoproteins

Answer 9

Cell recognition

Question 10

Function of cell surface membranes

Answer 10

Allow take up of selected nutrients

Secretion of chemicals

Change shape

Contain cellular components inside cell

Question 11

Function of organelle membranes

Answer 11

Isolate organelles from cytoplasm allowing cellular processes to occur separately

Question 12

Fluid mosaic theory

Answer 12

Fluid how the components move in respect to one another

Mosaic how the proteins are scattered