AP Biology Membrane- Labster Quiz

In the phospholipid, the polar head is considered what type of structure?

• hydrophobic
• insoluble
• hydrophilic

Lipids do not dissolve in water because they are _______________

• polar
• water soluble
• non-polar

Helps the cell membrane maintain fluidity.

• Phospholipid bilayer
• Transport Protein
• Cholesterol
• Carbohydrate Chains

Which drawing below that represents the most stable (lowest potential energy) assembly of phospholipids where water is surrounding the membrane but is not inside.

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• 
• 

Which structure is the hydrophilic polar head of the phospholipid molecule?

• F

• D

• C

• A1

Which structure is the hydrophobic tail of the phospholipid molecule?

• E

• B

• G

• A2

Which drawing below that represents the most stable (lowest potential energy) assembly of phospholipids when placed in a nonpolar substance.

• 
• 
• 

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

• Bihydrophicity
• Amphipathic
• Hydrophilic
• Dipolarity

Hydrophobic region of the cell membrane?

• E
• B
• C
• A 

Tags

NGSS.MS-LS1-2

Define plasma membrane

• lipid that helps minimize effects of temperature

• only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

• flexible boundary of a cell that separates a cell from its surroundings

• may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face