Movement of Substances Across Plasma Membrane

The information below refers to a condition of a mustard green cells after being immersed in a solution

Vacuole shrinks

Plasma membrane and cytoplasm are pulled away from the cell wall.

What is the process experienced by the mustard green cell?

• turgid

• crenation

• haemolysis

• plasmolysis

A farmer applies too much fertiliser on his vegetables plant. What is the effect of his action to the plant?

• The vegetable plant will wilt

• The vegetable plant will die

• The vegetable plant will look fresh

• The vegetable plant will grow much faster

An experiment was conducted to investigate the effect of sucrose concentration on the mass of potato strips. Potato strips were placed in 5%, 15% and 30% sucrose solution. The initial mass of the potato strips are 1.40g. Which of the following should be the final mass of the potato strip in 30% sucrose solution?

• 1.14 g

• 1.40 g

• 1.58 g

• 1.79 g

Diagram shows the condition of red blood cell before & after being immersed in solution X.

What is solution X and the process that takes place in the red blood cell?

• Distilled water ; plasmolysis

• Distilled water ; crenation

• 20% sucrose solution ; plasmolysis

• 20% sucrose solution ; crenation

Diagram shows a plant cell which has been placed in 30% sucrose solution for an hour.

What is the substance found in M?

• Water molecule

• Distilled water

• Sucrose molecule

• Sucrose solution

Diagram 2 shows the diffusion of water molecules

through a Visking tubing.

After one hour, the Visking tubing becomes turgid.

What are P and Q?

• P 20% sucrose solution; Q 20% sucrose solution

• P 20% sucrose solution; Q 5% sucrose solution

• P 5% sucrose solution; Q 5% sucrose solution

• P 5% sucrose solution; Q 20% sucrose solution

Which of the following statement is true about

facilitated diffusion?

• The process is passive.

• Facilitated diffusion does not involve carrier

  protein.

• This process requires expenditure of energy by

  the cell

• Facilitated diffusion does not occur in the

  presence of respiratory poison.

Sample strips of potato tissue were placed in different

concentrations of a sucrose solution. The mass of

potato strips at the beginning and at the end of the

experiment are recorded in Diagram 5.

Based on Diagram 5, which concentration would be

hypertonic to the potato cells?

• 10%

• 20%

• 25%

• 35%

Diagram 4 shows one strip of water spinach stem. Which of the following shows the condition of the

strip after being soaked in seawater?

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