Biology PreQuiz on Osmosis

Which statement describes the process of osmosis in an animal cell?

• Sugar molecules move across the plasma membrane until the cell has enough energy to grow in size and divide.

• Water molecules move across the plasma membrane until solute concentrations are equal on both sides of the membrane.

• Ions move across the plasma membrane until the inside of the cell has a higher concentration of positive charges.

• Enzymes move across the plasma membrane until the cell has completed metabolism.

A red blood cell is placed into an isotonic water solution. The red blood cell has a lower concentration of protein and sugar than the outside solution, as shown in the diagram. In the diagram, the volume of the cell is equal to the volume outside the cell. What is most likely to occur?

• Water from the solution will diffuse into the red blood cell.

• Water from the red blood cell will diffuse into the solution.

• Protein and sugar from the solution will diffuse into the red blood cell.

• Protein and sugar from the red blood cell will diffuse into the solution.

Tags

NGSS.HS-LS1-3

Students investigate osmosis using dialysis tubing. Dialysis tubing is a semipermeable membrane that allows water molecules to pass through while preventing salt ions from passing through. The students follow this procedure: 1. Mix salt into water to make a 7.1% salt solution. 2. Add equal amounts of this saltwater solution to four small bags made of dialysis tubing. 3. Fill four beakers with different salt solutions as shown in the image. 4. Place each small bag into one of the four beakers. 5. Observe changes in the size of the bags. In which beaker will osmosis cause shrinking of the dialysis tubing bag?

• Beaker 1

• Beaker 2

• Beaker 3

• Beaker 4

Materials move through the cell membrane by active and passive transport. Which diagram illustrates active transport?

• A

• B

• C

• D

A type of cellular transport is shown. Which description best identifies this type of cellular transport?

• Active transport, because energy is being used to move molecules against the concentration gradient

• Facilitated diffusion, because energy is being used to move molecules with the concentration gradient

• Osmosis, because energy is not being used to move molecules with the concentration gradient

• Endocytosis, because energy is not being used to move molecules against the concentration gradient

Select all that are a type of passive transport.

• Diffusion

• Endocytosis

• Exocytosis

• Facilitated Diffusion

• Osmosis

A student was investigating homeostasis in cells by studying a cell’s role in passive transport. He drew the model below to show this transport. What is occurring in passive transport across the concentration gradient?

• Particles move from areas of low concentration to higher concentration.

• Particles move from areas of high concentration to lower concentration.

• Particles move from the bottom areas towards the top.

• Particles move from the top areas towards the bottom.

Tags

NGSS.HS-LS1-3

Which statement provides a conclusion about the transport of water in and out of cells based on the results of the student’s experiment?

• Water moves freely both inside and outside of the cell independent of the solute concentration.

• Water movement into the cell is dependent on the concentration of the solutes both inside and outside of the cell.

• Water transports solutes out of the cell to balance the concentrations of solutes both inside and outside the cell.

• Water moves into the cell and solutes move out of the cell to ensure their concentration is balanced both inside and outside of the cell.

Tags

NGSS.HS-LS1-3

A potato core was placed in a beaker of water as shown in the figure below. Which diagram best represents the net movement of water molecules?

• A

• B

• C

• D

Assuming that the purple molecules are too large to pass through the membrane, what would happen to the water level as a result of osmosis?

• The water level would rise on the A side

• The water level would rise on the B side

• The water level would remain constant

• The water level would drop on the A side.