last quiz

The dispersal of food coloring in a beaker of water is an example of

• deposition

• diffusion

• active transport

• endocytosis

The cell membrane allows molecules to move in and out of the cell. This helps to maintain

• evolution

• homeostasis

• integrity

• independence

A student put together the experimental setup shown below. The selectively permeable membrane is permeable to water, but not the solute shown. Which direction will the solvent move?

• to the right

• to the left

• will not move

• more information is needed to answer the question

The movement of water molecules in and out of the cell through the membrane is called

• isotonic

• facilitated diffusion

• osmosis

• gradient

A red blood cell is placed into an aqueous (water) solution. The red blood cell has a lower concentration of protein and sugar than the aqueous solution, as shown in the diagram. In the diagram, the volume of the cell is equal to the volume outside the cell.

• 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

Some student used vinegar to dissolve away the shells of three eggs and used these eggs as models of human red blood cells. The students observed the changes in the eggs when they were placed in different.

Which statement best describes the role of the cell membrane in this model?

• The cell membrane is an impermeable barrier that prevents water from entering the cell

• The membrane allows solutes to enter the cell,which causes the cell to shrink

• The cell membrane allows water to enter and leave the cell.

• The cell membrane removes solutes from the environment.

The diagram below what occurred when an onion cell and a red blood cell were placed in distilled water.

• The red blood cells have only a cell membrane, which protects them from bursting

• the onion cells have a cell wall that protects them from bursting

• the onion cells have a cell membrane, which can protect them from bursting

• the red blood cells have a cell wall, which does not protect them from bursting

A cell that is surrounded by fresh water will burst because the osmosis will cause

• Solutes to move out of the cell

• Water to move out of the cell

• Water to move into the cell

• Solutes to move into the cell

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 diagram of a cell is shown below. The cell membrane is permeable to both the oxygen and carbon dioxide molecules. Which statement correctly describes the movement of oxygen and carbon dioxide molecules?

• Oxygen will enter the cell, and carbon dioxide will exit the cell.

• Oxygen will exit the cell, and carbon dioxide will enter the cell.

• Both oxygen and carbon dioxide will enter the cell.

• Both oxygen and carbon dioxide will exit the cell.