WorksheetsBiology
Total questions: 20
Worksheet time: 7mins
Which substance can move freely across the phospholipid bilayer of the plasma membrane?
A. Glucose
B. Amino acids
C. Glycerol
D. Ions
Which process involves the movement of water molecules through a selectively permeable membrane down a concentration gradient?
A. Diffusion
B. Osmosis
C. Facilitated diffusion
D. Active transport
Diagram 1 shows a model of the plasma membrane. The part labelled X is known as a ...............
A. carrier protein
B. channel protein
C. phospholipid
D. cholesterol
Diagram 2 shows the movement of ion X+ across the plasma membrane. WHich process transports ion X+ across the plasma membrane?
A. Osmosis
B. Facilitated diffusion
C. Simple diffusion
D. Active transport
Which of the following processes is affected by the presence of a metabolic poison?
A. Absorption of water by root hair cells
B. Uptake of iodine by algae living in the sea
C. Absorption of digested food in the small intestine
D. Movement of amino acids across the plasma membrane
Which cell component is present in large numbers in a cell that transports substances through active transport?
A. Robosome
B. Nucleus
C. Mitochondrion
D. Golgi apparatus
Which of the above events are related to the process of facilitated diffusion?
A. P and Q
B. P and S
C. Q and R
D. Q, R and S
Potatp strips of equal lengths were placed in sucrose solutions of different concentrations. Which graph shows the correct percentage change in the mass of the potato strips against the concentration of sucrose solution?
x-axis : concentration of sucrose solution
y-axis : mass of potato strip
A
B
C
D
Diagram 3 shows an experiment set-up to investigate osmosis. The Visking tubing and beaker in Diagram 3 are filled with solutions X and Y respectively.
A
B
C
D
An experiment was carried out using potato strips of equal length immersed in different concentrations of sucrose solutions. The lengths of the potato strips were measured at regular intervals. Which graph shows the results of the potato strip that was immersed in the weakest sucrose solution?
A
B
C
D
Diagram 5 shows a plant cell after being immersed in a concentrated sucrose solution for 15 minutes. Which of the following occupies the region labelled X?
A. Air
B. Sucrose solution
C. Water
D. Cell sap
Diagram 6 shows an experiment to demonstrate the movement of molecules across a selectively permeable membrane.
A
B
C
D
Diagram 7 shows the conditions of four strips of water convolvulus (kangkung) stems which are immersed in solutions of different concentrations for 40 minutes.
A
B
C
D
The graph in Diagram 8 shows the changes in the mass of the potato strips immersed in sucrose solutions of different concentrations. Based on the graph, which sucrose solution should be used to make a soft potato strip become firm again?
A. 1.0g per 100ml
B. 2.0g per 100ml
C. 2.5g per 100ml
D. 3.5g per 100ml
Diagram 9 shows a strip of mustard green after it has been soaked in solution X. Which of these could be most probably be X?
A. Water
B. Salt solution
C. Glucose solution
D. Sucrose solution
Which diagram shows the appearance of red blood cell after it has been placed in distilled water?
A
B
C
D
Which of the following reverts a plasmolysed cell to its normal condition?
A. Immerse the cell in distilled water
B. Immerse the cell in a concentrated salt solution
C. Immerse the cell in 10% sugar solution
D. Remove the cell from the solution
Which condition causes turgor pressure to develop in a plant cell?
A. Immerse the cell in salt solution
B. The cell sap of the plant cell is isotonic to the surroundings
C. The cell sap of the plant cell is hypotonic to the surroundings
D. The cell sap of the plant cell is hypertonic to the surroundings
Diagram 10 shows the apperance of an epidermal cell which was placed in solution P at the beginning of an experiment and then transferred to solution Q at the end of the experiment.
A. I and II
B. II and III
C. III and IV
D. I and IV
Diagram 11 shows two plant cells, X and Y. What happens when cell X has a lower concentration of dissolved substances than cell Y?
A. Water diffuses from cell X to cell Y through osmosis
B. Water diffuses from cell Y to cell X through osmosis
C. Dissolves substances diffuse from cell Y to cell X through osmosis
D. Dissolves substances diffuse from cell X to cell Y through osmosis
