PM Function & Passive Transport Quiz

Letter A

• Protein

• Carbohydrate Chain

• Phospholipid Bi-layer

• Cholesterol

• Phosphate Heads

Which part of the phospholipid is polar/hydrophilic?

• Cholesterol

• Phosphate heads

• Lipid tails

• Protein

Which part of the phospholipid bilayer adds strength to the PM and transports molecules across?

• Cholesterol

• Phospholipid

• Carbohydrate

• Protein

What function does the plasma membrane serve for the cell?

• Create energy for the cell

• Controls what enters and leaves the cell

• Breaks down toxins

• Synthesizes proteins for the cell

What organic molecule makes up the majority of the plasma membrane?

• Carbohydrate

• Nucleic Acid

• Lipid

• Protein

_______ transport moves molecules from an area of high concentration to an area of low concentration.

• Passive

• Active

• Endocytosis

• Sodium-Potassium pump

 A cell with a semi-permeable membrane has a 20% solute concentration.  It is placed in a beaker with 10% solute concentration.  The cell membrane is not permeable to solutes.  What will most likely happen?

• The water will move into the cell and it will swell.

• The water will move out of the cell and it will shrivel.

• The water will move into the cell and it will shrivel.

• The water will not move in or out.

Which of the following forms of passive transport uses a protein to guide larger molecules across the plasma membrane?

• Osmosis

• Diffusion

• Facilitated Diffusion

• Exocytosis

 In the situation below the semi-permeable membrane is only permeable to water.  What best describes what will happen after 20 minutes?

A- Cell Interior

B- Environment

• The cell will use energy to move sugar inside.

• The water will move from the environment into the cell.

• The sugar will move into the cell without energy.

• The water will move from the cell into the environment by osmosis

When a plant cell is placed in salt water, the interior of the plant cell will

• Swell due to intake of water

• Shrink due to release of water

• Swell due to the release of water

• Not change in size