Plasma Membrane

Question 1

What are the molecules within the membrane?

Answer 1

1. Integral proteins
2. Integral proteins 2
3. Glycoproteins
4. Glycolipids
5. Peripheral proteins
6. Cholesterol

Question 2

What are the functions of integral proteins?

Answer 2

1. Acts as carriers and channels of molecules, that cannot diffuse through the membrane e.g. amino acids, sugars and ions

Question 3

What are the functions of integral proteins 2?

Answer 3

1. Can be receptors for hormones or enzymes that catalyse reactions within the cell

Question 4

What are the functions of glycoproteins?

Answer 4

1. Play a role in cell division (sticking together) and as a receptor that sends/receives chemical signals

Question 5

What are the functions of glycolipids?

Answer 5

1. Allow for cell recognition during the immune response and enable cell adhesion to create tissues

Question 6

What is the function of peripheral proteins

Answer 6

1. Free proteins on cell membrane surface or bound to an intrinsic protein. Function as an enzyme to catalyse reactions

Question 7

What is the function of cholesterol?

Answer 7

1. Controls membrane fluidity and keeps cells stable at body temperature (prevents bursting) more cholesterol=less fluidity