Cell Membrane Structure

Most of the cell membrane is made of...

• Lipids
• Carbohydrates
• Proteins
• Nucleic acids

Hydrophobic region of the cell membrane?

• E
• B
• C
• A 

Phospholipid heads are...

• Hydrophobic
• Hydrophilic

___________ allow cells to recognize each other and act like ID tags. 

• Carbohydrates 
• Proteins
• Phospholipids 
• Cholesterol

How many layers is the lipid bilayer?

• 1
• 2
• 3
• 4

True or False: Large molecules, such as glucose, can easily pass through the cell membrane without any help...

• True: They pass right through.
• False: They need a protein channel.

The cell membrane is made up of 

• Polar heads, non-polar tails
• Non-polar heads, polar tails
• Polar heads, polar tails
• Non-polar heads, non-polar tails

What forms the channels and pumps in the phospholipid bilayer?

• Carbohydrates
• Proteins
• Hydrophilic heads 
• Lipids

Part of the plasma membrane responsible for cell recognition... 

• C
• E
• B
• D

True or False: Phospholipids can move laterally along the plane of the membrane. 

• True
• False