Biology 0610 · IGCSE
Diffusion
95 practice questions on Diffusion, with worked solutions and instant marking.
The diagram shows a test-tube filled with clear jelly. A drop of blue ink is injected into the centre of the jelly. The blue colour from the ink spreads all through the jelly. By which process does the blue ink spread through the jelly?
Feb/March 2016
What is responsible for the diffusion of oxygen into a plant cell?
Feb/March 2016
Which graph shows the effect of a rise in temperature on the rate of diffusion?
Feb/March 2018
A frog is an animal. The skin of a frog is permeable to oxygen and carbon dioxide. While a frog is swimming in pond water, what will the net directions of diffusion be for oxygen and carbon dioxide?
Feb/March 2019
A frog is an animal. A frog's skin is permeable to oxygen and carbon dioxide. While a frog is swimming in pond water, what will the net diffusion directions of oxygen and carbon dioxide be?
Feb/March 2019
What process is taking place at X?
Feb/March 2021
An upside-down jar of air was positioned above a jar that contains a brown gas, as illustrated. Which process has occurred?
Feb/March 2021
An inverted jar of air was set on top of a jar that contained a brown gas, as illustrated. Which process has occurred?
Feb/March 2021
The diagram illustrates the apparatus used in an experiment. The apparatus was maintained at $35\,^{\circ}\text{C}$. What is likely to be present in the water around the membrane after 45 minutes?
Feb/March 2023
Which factor would reduce the rate at which oxygen diffuses into cells?
Feb/March 2023
Which condition would cause oxygen molecules to diffuse out of a photosynthesising leaf more quickly?
Feb/March 2024
What raises the rate at which oxygen diffuses into a cell?
Feb/March 2025
Fig. 1.1 illustrates particles moving through an epithelial cell in the small intestine.
Feb/March 2025
The diagram illustrates an experiment used to show the movement of molecules. After one hour, the water in the beaker had become red. What is the most likely explanation for this colour change?
May/June 2016
As shown, a jar filled with air was turned upside down and positioned above a jar that contained a brown gas. Which process has occurred?
May/June 2016
A student carried out an investigation into how substances diffuse through Visking tubing, an artificial membrane that shares several properties with cell membranes.
May/June 2016
Which features are true of both osmosis and diffusion?
May/June 2017
The diagram illustrates substances entering and leaving a living cell. Which process is occurring in this cell?
May/June 2017
Which of these characteristics apply to both osmosis and diffusion?
May/June 2017
What characteristics apply to both osmosis and diffusion?
May/June 2017
Which features are true of both osmosis and diffusion?
May/June 2017
Which features are true for both osmosis and diffusion?
May/June 2017
Which features are true for both osmosis and diffusion?
May/June 2017
Which row correctly matches the named process to its description?
May/June 2018
Which words correctly fill the paragraph? Diffusion can be described as the overall movement of particles from an area of their ......1...... concentration to an area of their ......2...... concentration, with the movement occurring ......3...... a concentration gradient.
May/June 2018
Which words complete the paragraph correctly? Diffusion can be described as the net movement of particles from an area of ....1.... concentration to an area of ....2.... concentration, with movement occurring ....3.... a concentration gradient.
May/June 2018
The diagram depicts a test-tube filled with transparent jelly. A drop of blue ink is placed into the centre of the jelly. The blue colour then spreads all the way through the jelly. By which process does the blue ink spread through the jelly?
May/June 2019
The diagram depicts a test-tube of transparent jelly. A drop of blue ink is injected into the centre of the jelly. The blue colour of the ink gradually spreads all through the jelly. Which process causes the blue ink to spread through the jelly?
May/June 2019
The diagram depicts a test-tube filled with clear jelly. A drop of blue ink is placed into the centre of the jelly. The blue colour from the ink then spreads through the jelly. By which process does the blue ink spread through the jelly?
May/June 2019
The diagram shows a test tube with transparent jelly inside. A drop of blue ink is placed into the centre of the jelly. The blue colour then spreads through the jelly. By which process does the blue ink spread through the jelly?
May/June 2019
The diagram depicts a test-tube filled with transparent jelly. A drop of blue ink is placed into the centre of the jelly. The blue colour then spreads all through the jelly. Through which process does the blue ink spread through the jelly?
May/June 2019
The diagram depicts a test tube filled with transparent jelly. A drop of blue ink is introduced into the centre of the jelly. The blue colour then disperses through the jelly. Through which process does the blue ink spread through the jelly?
May/June 2019
Through which process do oxygen and carbon dioxide pass between cells and capillaries?
May/June 2021
Through which process do oxygen and carbon dioxide move between cells and capillaries?
May/June 2021
Through what process do oxygen and carbon dioxide pass between cells and capillaries?
May/June 2021
Through what process do oxygen and carbon dioxide pass between cells and capillaries?
May/June 2021
By what process do oxygen and carbon dioxide pass between cells and capillaries?
May/June 2021
What process is used for oxygen and carbon dioxide to move between cells and capillaries?
May/June 2021
Which statement gives the net movement of particles in diffusion?
May/June 2022
Female moths emit chemicals into the air. Male moths detect these chemicals and fly towards the females. By what process do the chemicals spread through the air?
May/June 2022
Which statement correctly describes the overall movement of particles during diffusion?
May/June 2022
Female moths give off chemicals into the air. Male moths sense these chemicals and move towards the females. How do the chemicals travel through the air?
May/June 2022
The diagram shows a test-tube filled with clear jelly. A drop of blue ink is injected into the centre of the jelly. The blue colour from the ink then spreads all through the jelly. By what process does the blue ink spread through the jelly?
May/June 2023
Which statements are true for both diffusion and osmosis?
May/June 2023
In some animals, gas exchange takes place across the skin. Which features are most likely to be found in the skin of these animals?
May/June 2023
Through which process does oxygen move out of a leaf?
May/June 2023
The diagram illustrates glucose molecules moving through a cell membrane. Which statement best describes molecule T?
May/June 2023
Which row shows ions diffusing into a cell at the fastest rate?
May/June 2024
Can you give one example of diffusion?
May/June 2024
Which graph shows the effect of a rise in temperature on the rate of diffusion?
May/June 2024
Which characteristics are true for both osmosis and diffusion?
May/June 2024
Which process transfers neurotransmitters across a synapse?
May/June 2024
What will increase the rate at which diffusion occurs across a gas exchange surface?
May/June 2024
A student explored how surface area influenced the rate of diffusion. The student began with four agar cubes, each with a volume of $1\text{ cm}^3$. The agar cubes were stained with a red indicator. When the red indicator was exposed to acid, it changed to yellow. To raise the surface area, the student cut the cubes into different numbers of blocks. As shown in Fig. 3.1, the blocks were then put into acid. For each test-tube, the student measured how long it took for every agar block to turn yellow. The investigation was carried out twice more, and a mean was then calculated.
May/June 2024
Which row correctly matches the named process to its description?
May/June 2025
Finish the statements about diffusion. Diffusion is the net movement of particles from a region of their [BLANK] concentration to a region of their [BLANK] concentration (down a concentration [BLANK]). The energy for diffusion comes from the [BLANK] energy of the [BLANK] movement of molecules.
May/June 2025
What would cause the rate of diffusion into a cell to decrease?
Oct/Nov 2016
Complete Table 6.1 on diffusion and active transport. Put a tick (✓) in every box that is correct.
Oct/Nov 2016
A number of different factors influence the rate at which molecules diffuse across a membrane. Which row shows changes to factors that would raise the rate of diffusion?
Oct/Nov 2017
What would make the rate of diffusion of oxygen into an animal cell increase?
Oct/Nov 2017
By what process do carbon dioxide and oxygen enter and leave a mesophyll cell?
Oct/Nov 2018
By what process do carbon dioxide and oxygen enter and leave a mesophyll cell?
Oct/Nov 2018
How do carbon dioxide and oxygen enter and leave a mesophyll cell?
Oct/Nov 2018
By what process do carbon dioxide and oxygen enter and leave a mesophyll cell?
Oct/Nov 2018
By what process do carbon dioxide and oxygen enter and leave a mesophyll cell?
Oct/Nov 2018
By what process do carbon dioxide and oxygen enter and leave a mesophyll cell?
Oct/Nov 2018
The diagram illustrates an experiment left at room temperature. After 45 minutes, what is found in the water around the membrane?
Oct/Nov 2019
State one example of diffusion.
Oct/Nov 2019
The diagram illustrates an experiment carried out at room temperature. A tubing that contains starch, protease, protein and simple sugars is put into distilled water. The membrane allows only small molecules to pass through. What is found in the water outside the membrane after 45 minutes?
Oct/Nov 2019
The diagram depicts an experiment maintained at room temperature. After 45 minutes, what is found in the water around the membrane?
Oct/Nov 2019
The diagram illustrates an experiment maintained at room temperature. What is found in the water around the membrane after 45 minutes?
Oct/Nov 2019
Give one example of diffusion.
Oct/Nov 2019
The diagram depicts an experiment left at room temperature. What is found in the water around the membrane after 45 minutes?
Oct/Nov 2019
The diagram illustrates an experiment maintained at room temperature. After $45$ minutes, what is found in the water around the membrane?
Oct/Nov 2019
Which words fill the gaps in the definition of diffusion? "Diffusion is the net movement of particles from a region of ......1...... concentration to a region of ......2...... concentration, ......3...... a concentration gradient."
Oct/Nov 2021
Which of the following statements about diffusion is correct?
Oct/Nov 2021
In which diagram would oxygen pass into the cell by diffusion?
Oct/Nov 2021
Fill the gaps to complete the definition of diffusion: ‘Diffusion is the net movement of particles from an area of .....1..... concentration to an area of .....2..... concentration, .....3..... a concentration gradient.’
Oct/Nov 2021
Which statement about diffusion is right?
Oct/Nov 2021
In which diagram would oxygen move into the cell by diffusion?
Oct/Nov 2021
State the names of the two other major groups of vertebrates.
Oct/Nov 2021
Particles can pass into and out of cells by diffusion. Which statement about diffusion is correct?
Oct/Nov 2022
Which process could carry on without energy supplied by respiration?
Oct/Nov 2022
Which process could continue without energy supplied by respiration?
Oct/Nov 2022
In which diagram would the greatest number of oxygen molecules diffuse across the membrane each minute?
Oct/Nov 2022
What leads to oxygen diffusing into a plant cell?
Oct/Nov 2023
What would cause the rate of diffusion into a cell to decrease?
Oct/Nov 2023
A frog is an animal. Frog skin is permeable to oxygen and carbon dioxide. In which directions will there be a net diffusion of oxygen and carbon dioxide when a frog is swimming in pond water?
Oct/Nov 2024
Which of the following statements about diffusion are correct?
Oct/Nov 2024
Fig. 1.1 is a diagram illustrating the diffusion of oxygen molecules across a cell membrane. The arrow indicates the direction of the net movement of oxygen molecules through the membrane. The diagram is labelled with outside the cell, inside the cell, oxygen molecule and cell membrane.
Oct/Nov 2024
Several different variables influence how quickly molecules diffuse through a membrane. Which row indicates the changes that would produce the largest rise in the diffusion rate?
Oct/Nov 2025
Which factor would cause the rate of diffusion to decrease?
Oct/Nov 2025
Which process transfers oxygen out of the soil into a root hair cell?
Oct/Nov 2025
Which statement gives the net direction in which a substance moves across the placenta?
Oct/Nov 2025
Diffusion can be described as the net movement of particles from a region of ......1...... concentration to a region of ......2...... concentration, where the movement is ......3...... a concentration gradient. Which words fill gaps 1, 2 and 3?
Oct/Nov 2025