2.3 Effects of Osmosis

What is the definition of osmosis?

What is plasmolysis?

• Breaking down of cell wall

• Shrinking of cell membrane away from the cell wall

• Maintaining the shape of the cell

• Synthesising cellulose to build the cell wall

How would you describe the state of these cheek cells?

• turgid

• burst

• plasmolysed

• crenated

How would you describe the state of these cells?

• turgid

• burst

• plasmolysed

• crenated

How would you describe the state of these blood cells?

• turgid

• burst

• plasmolysed

• crenated

How would you describe the state of these plant cells?

• turgid

• burst

• plasmolysed

• crenated

What would happen to a plant cell look when it is placed in a highly concentrated salt solution?

What would happen to a red blood cell look when it is placed in pure water?

Cylinders of potato tissue were placed in different concentrations of a sugar solution.

The graph shows the percentage change in length of the cylinders of potato tissue.

What solution has the same water potential as the potato tissue?

• 0.2 mol

• 0.3 mol

• 0.4 mol

• 0.5 mol

An experiment is carried out to investigate osmosis. Potato slices of the same mass, size and shape are put into four beakers containing different liquids.

 

In which liquid would the potato slice gain the most mass?

• concentrated salt solution

• dilute sugar solution

• distilled water

• hydrochloric acid