Plasma Membrane

Question 1

What are the two main component of the plasma membrane?

Answer 1

• Proteins

- Phospholipids

Question 2

What are the components of the Phospholipid?

Answer 2

It contains a phosphate head and 2 fatty acid tails

Question 3

Is the phosphate head hydrophilic or hydrophobic?

Answer 3

Hydrophilic(water-loving)

Question 4

Are the fatty acid tails hydrophilic or hydrophobic?

Answer 4

Hydrophobic(water-hating)

Question 5

What are the two main types of proteins in the cell membrane?

Answer 5

• Integral Proteins

- Peripheral Proteins

Question 6

Where are the Integral Proteins found?

Answer 6

They span the width of the membrane

Question 7

Where are the Peripheral Proteins found?

Answer 7

They’re usually associated on the outside of the membrane

Question 8

Function of the Plasma Membrane

Answer 8

It controls which substances move in and out of the cell. It ensures that the cell keeps what it needs and expels what it doesn’t. This ensures a balance of the internal cell environment.

Question 9

What are Glycoproteins?

Answer 9

They are proteins with carbohydrates attached. It allows it to bind with other cells of the same type. (A protein molecule that has one or more carbohydrate u it’s covalently bonded to it.

Question 10

What are Glycolipid?

Answer 10

A lipid molecule that has one or more carbohydrate unit covalently bonded to it.

Question 11

Function of Channel proteins

Answer 11

Form a pore through the hydrophobic interior of the membrane to enable water soluble molecules to pass by facilitated diffusion

Question 12

Function of the Carrier proteins

Answer 12

Permit the passage of specific molecules by facilitated diffusion or active transport

Question 13

Function of cholesterol molecules

Answer 13

Regulates membrane consistency. Cholesterol helps to restrict the passage of molecules by increasing the packaging of phospholipids.