Cell Membrane Quiz

Which cell membrane structures form a bilayer, are mainly responsible for the selective permeability of the cell membrane, and are composed of hydrophilic heads and hydrophobic tails?

• phospholipids
• transport proteins
• cholesterol
• carbohydrate chains

Which cell membrane structures allow for movement of some substances across the cell membrane?  The substances that move through the membrane are unable to cross the hydrophobic tails in the membrane.

• phospholipids
• transport proteins
• cholesterol
• carbohydrate chains

What does the term "fluid mosaic" mean in regards to the fluid mosaic model of the cell membrane?

• The membrane is always composed of the same parts in the same locations.
• The membrane is in constant motion and is made of many different parts.
• The membrane allows some substances to pass through while other substances cannot pass through.
• The membrane is made of only one type of structure that is always moving.

What is structure B?

• carbohydrate chain
• phospholipid head
• phospholipid tail
• cholesterol

Hydrophobic region of the cell membrane?

• E
• B
• C
• A 

The function of the plasma membrane is....

• to regulate what enters and leaves the cell.
• fight bacteria and viruses that enter the cell.
• provide rigid support and protection to the cell.
• make sure each cell can move

Which of the following would impact a chemical's ability to enter through the cell membrane?

• size

• polarity (charges it has)

• concentration

• A + C

• A, B + C

True or False. There are some particles that will constantly go in and out of the phospholipid bilayer without needing a protein to get through.

• True

• False

As the surface area increases within the membrane, it allows for,

• more enzymes being produced on the membrane

• more opportunities for the proteins to take in or eliminate waste

• phospholipids to get swole and massively enlarge

True or False. Proteins that are in the membrane have hydrophilic areas inside to allow for chemicals to pass through them without having to try and go through the hydrophobic phospholipid bilayer.

• True

• False