Cell Membrane Components

Question 1

Name the components in the cell membrane.

Answer 1

Glycolipids, glycoproteins, cholosterol, extrinsic and intrinsic proteins.

Question 2

What is a glycoprotein?

Answer 2

A protein molecule with a carbohydrate branched from it.

Question 3

Why is a glycolipid?

Answer 3

A lipid molecule with carbohydrate attached to it.

Question 4

Function of glycolipid and glycoprotein.

Answer 4

Act as recognition sites (glycoprotein e.g. hormones and glycolipid e.g. cholera toxins).

Question 5

Function of cholesterol.

Answer 5

For flexibility and stability.

Question 6

Difference between extrinsic and intrinsic proteins.

Answer 6

Extrinsic proteins are found on the external surface of the membrane and Intrinsic proteins are found within the bilayer as a whole unit interred with the phospholipid bilyaer

Question 7

How can the position of the extrinsic and intrinsic proteins relate to their function?

Answer 7

Extrinsic can be found on the external surface so it is able to act as a receptor and bind to other substances and generally, as an adhesion molecule. Intrinsic is found internally and can act as a channel or pore letting substances in and out.