Cell Membrane

Question 1

Functions of cholesterol

Answer 1

It reduces lateral movement
Bonds with hydrophobic tail
Prevents water leakage
Makes membrane less fluid at high temps

Question 2

Functions of glycolipids

Answer 2

Recognition sites
Maintain stability
Helps cells stick to each other in tissues

Question 3

Function of glycoproteins

Answer 3

Recognition sites
Help cells attach to each other
Allows cells to recognise each other

Question 4

Properties of molecules that can’t pass through the membrane

Answer 4

Too big
Insoluble in lipids
Same charge as the protein channel
Polar

Question 5

Functions of the phospholipid bi layer

Answer 5

Allows lipid soluble stuff in/out
Prevents water soluble stuff
Makes the membrane flexible and self sealing