plasma membrane

Question 1

What is the structure of plasma membrane?

Answer 1

Fluid mosaic model
Phospholipid bilayer
hydrophilic phosphate head on the outside
Hydrophobic fatty acid tail on the inside
Membrane proteins scattered across the membrane
Cholesterol between fatty acid to control stability

Question 2

What are two transport protein on the plasma membrane

Answer 2

Channelled - facilitated diffusion
Carrier - Active transport

Question 3

What are the function of cell-surface plasma membrane?

Answer 3

Cell signalling
site of reaction
Partially permeable

Question 4

What are the function of intracellular plasma membrane?

Answer 4

Compartmentalisation
site of reaction

Question 5

What molecules need to enter cells through channels or carrier proteins?

Answer 5

Large, charged molecules