unit 1 key area 2 cell membrane structure

Question 1

the cell membrane is made up of ? (2)

Answer 1

proteins

phospholipids

Question 2

the phospholipids form what? What does this mean?

Answer 2

1. A bilayer

2. This mean that there is two layers of them

Question 3

what are the four membrane protein functions?(4)

Answer 3

Transporter protein
receptor protein
enzyme protein
structural protein

Question 4

the structure of the membrane is described using the fluid mosaic model. Why?

Answer 4

Because-
the phospholipid layer is fluid and flexible
the proteins which are studded in the surface of the lipid bilayer create a mosaic pattern

Question 5

the cell membrane is selectively permeable. This means that only small and soluble substances can pass through. List 5 things that can pass diffuse a membrane and 4 things that cant

Answer 5

5 that can are-
glucose
water
oxygen
co2
amino acids
4 things that cant-
starch 
protein
fat
sucrose