AP - Unit 2: Membrane Structure and Function

When immersed in water, which of the following shows the expected orientation of the phospholipids?

• 
• 
• 
• 

What is the name for a molecule that has a polar head region and a hydrophobic tail region?

• Bihydrophicity
• Amphipathic
• Hydrophilic
• Dipolarity

In water, phosphopids line up in two layers

• tail to tail
• head to head
• tail to head 
• depends on the salinity of the water

Tags

NGSS.HS-ESS2-5

The phospholipid tails are _____________ & _____________ (2 answers)

• Hydrophilic

• Hydrophobic

• Polar (+)

• Non-polar

The phospholipid head is _____________ & _____________ (2 answers)

• Hydrophilic

• Hydrophobic

• Polar (+)

• Non-Polar

The majority of the cell membrane is made of which macromolecule?

• Lipids
• Carbs
• Proteins
• Nucleic acids

Which statement about cholesterol molecules is true?

• They help hold a membrane together.
• They alter the fluidity of the membrane.
• They attach to carbohydrates.
• They disrupt membrane function.

What two parts make up a phospholipid?

• One Hydrophilic Head, Two Hydrophobic Tails

• One Hydrophobic Head, Two Hydrophilic Tails

• Two Hydrophilic Heads, One Hydrophobic Tails

• Two Hydrophobic Heads, One Hydrophilic Tail 

"Water Loving"

• Hydrophobic
• Hydrophilic 

"Water Fearing" 

• Hydrophobic
• Hydrophilic