Cell Membrane

Question 1

What are the functions of cholesterol in the plasma membrane?

Answer 1

Cholesterol contributes to both the fluidity and the stability of the membrane.

Question 2

What are the four types of membrane protein?

Answer 2

• Transporter
• Receptor
• Enzyme
• Anchor

Question 3

State the characteristic of Integral protein

Answer 3

• Embedded in the lipid bilayer
• Aka transmembrane proteins

Question 4

State the characteristic of Peripheral protein

Answer 4

• Polar molecule that do not penetrate the membrane
• More commonly found on the inner

Question 5

State the 4 functions of plasma membrane

Answer 5

• Acts as a barrier separating inside and outside of the cell
• Controls the flow of substance into and out of the cell
• Helps identity the cell to other cell
• Participates in intercellular signaling

Question 6

The plasma membrane is made up of 3 major component, which are..

Answer 6

• Phospholipid
• Cholesterol
• Glycolipid