Cell Transport Review 2

The diagram to the right shows the same type of molecule on side A and side B.  According to diffusion, which direction will the molecules move?

• Molecules move towards B until equilibrium is reached
• Molecules move towards A
• Molecules won’t move
• All of the molecules will explode

Tags

NGSS.MS-PS1-2

Placing wilted cabbage  in cold water will make it crisp again. Which statement best describes what happens to restore the cabbage to its original condition?

•  Water left the cabbage cells by diffusion
• Water entered the cells of the cabbage by osmosis
• Osmosis caused salts to enter the cabbage cells.
• Salts in the cabbage leaf caused water to leave the cells.

You are conducting osmosis experiments with a test tube of human cells in solution.  You pour table salt into the test tube.  According to the principles of osmosis, what can you predict will happen to the cells? 

• They will swell and burst
• They will not be affected.
• They will shrink and shrivel.
• They will undergo rapid mitosis.

Which is an example of osmosis?

• potassium ions moving in and out of an animal cell
• carbon dioxide moving into the leaf cells of a plant
• oxygen moving into the bloodstream from the lungs
• water moving into the root cells of a plant

Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane?

• Substances are moving rapidly across the cell membrane
• ATP is being rapidly consumed near the cellular membrane.
• Substances are moving from high to low concentrations
• Substances are moving through channels in the cell membrane.

 The diagram to the left represents the fluid mosaic model of a cell membrane.  What do the molecules labeled A and B represent?

• proteins and phospholipids.
• nucleic acids and carbohydrates
• nucleic acids and phospholipids
• proteins and carbohydrates

Cell membranes are described as selectively permeable.

Four students were asked to explain what this means. Which one is correct?

• Student 1: Cell membranes prevent all materials from entering the cell.

• Student 2: Cell membranes only provide structural support for the cell.

• Student 3: Cell membranes regulate which substances can enter and exit the cell.

• Student 4: Cell membranes allow water and water-soluble substances to enter the cell.

What type of transport uses a transport protein?

• Osmosis

• Facilitated diffusion

• Passive Transport
• Active Transport

Solutes move against the concentration gradient

• Passive Transport
• Active Transport