F4 Biology Chapter 3

Diagram shows an experiment to study osmosis. Which of the following statement is true about the process?

• Water molecule diffuse from K to L until dynamic equilibrium is achieved.

• Water molecule diffuse from L to K until dynamic equilibrium is achieved

• Before experiment, K has low water potential compared to L

• Before experiment, L has high water potential compared to K

Which of the following are related to sodium-potassium pump?

• Requires channel protein

• Transport hydrogen ions

• Requires energy from ATP molecules

• Movement of ions are against concentration gradient

Diagram shows the apparatus set up of an experiment.

Which graph represents the changes in the mass of the Visking tubing after 1 hour?

• 
• 
• 
• 

Diagram shows the movement of molecules X across the plasma membrane. Which substance represents molecule X?

• Fatty acid

• Glucose

• Vitamin A, D, E and K

• Water

Which organelle A, B, C and D maintains the turgidity of plants

• A

• B

• C

• D

Diagram shows the condition of red blood cell when placed in a type of

solution X. Which of the following explains the condition of the red blood cell?

(Two answers)

• The red blood cell is haemolysed

• Solution X is hypertonic to the red blood cell

• Solution X is isotonic to the red blood cell

• The red blood cell is hypotonic to the solution X

Diagram shows the movement of molecules Y across the plasma membrane. What is the conclusion?

• Molecules Y move by facilitated diffusion

• Molecules Y move by osmosis

• Molecules Y is lipid soluble

• Molecules Y move by facilitated transportation

Diagram shows the condition of a cell before and after being immersed in solution Y. What is solution Y and process involved?

• Solution Y: Hypotonic ; Process : Plasmolysis

• Solution Y: Hypertonic ; Process : Plasmolysis

• Solution Y: Hypotonic ; Process : Deplasmolysis

• Solution Y: Hypertonic ; Process : Deplasmolysis