Topic 4 - Cell membranes

Question 1

What is the size of the cell membrane

Answer 1

Approximately 7nm

Question 2

What is the function of the cell membrane

Answer 2

Controld entry amd exit of substances (selectively permeable)

Question 3

What is cell membrane often referred to?

Answer 3

Fluid mosaic model

Question 4

What does the ‘fluid ‘ and ‘mosaic’ means in the fluid mosaic model?

Answer 4

Fluid - Individual molecules of the cell surface membrane can move relative to one another.
Mosaic - From area view/bird eye view, the protein molecules looks like icebergs floating on ocean surface.

Question 5

List the components of Fluid Mosaic model.

Answer 5

Phospholipids, proteins, cholesterol, glycolipids & glycoproteins