Diffusion — Paper 1 · IGCSE Science - Combined 0653

1 Which statement about diffusion is correct? A Changing temperature has no effect on the diffusion of molecules. B Diffusion involves the random movement of molecules. C Small molecules enter but do not leave cells by diffusion. D Small molecules diffuse through cell membranes but not through cell walls.

1 marks

Answer: B

This question in 0653/11 May/June 2006

1 Living and dead plant cells are placed in a dilute solution of red dye. After a few minutes the cells are observed using a microscope. Only the dead cells are stained red. Which part of the living cells stops the uptake of the red dye? A cell membrane B cell wall C cytoplasm D nucleus

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2006

5 The diagram shows an alveolus and one of its capillaries. wall of alveolus capillary wall red blood cells What moves in the direction shown by the arrows? A carbon dioxide B hydrogen C oxygen D water

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2006

2 An experiment is set up as shown. water soluble blue crystals After several hours, the water turns blue. Which process causes this colour change to take place? A absorption B diffusion C digestion D evaporation

1 marks

Answer: B

This question in 0653/11 May/June 2008

2 The diagram shows a leaf in sunlight and some of the substances that diffuse into and out of it. water vapour carbon oxygen dioxide Which of the following has a higher concentration outside the leaf than inside the leaf? A carbon dioxide only B carbon dioxide and oxygen C oxygen and water D water vapour only

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2008

2 Which parts of a plant cell are fully permeable? cell surface cell wall membrane A v v B v x Cc x v D x x

1 marks

Answer: C

This question in 0653/11 May/June 2009

2 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/11 May/June 2010

3 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/12 May/June 2010

3 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/13 May/June 2010

2 When a plant cell is placed in a dilute solution of red dye, the contents of the cell do not become red. What prevents the dye molecules from entering the cell? A cell surface membrane B chloroplasts C cytoplasm D vacuole

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2010

6 The diagram shows an alveolus and one of its capillaries. wall of alveolus capillary wall red blood cells What moves in the direction shown by the arrows? A carbon dioxide B hydrogen C oxygen D water

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2010

3 When a plant cell is placed in a dilute solution of red dye, the contents of the cell do not become red. What prevents the dye molecules from entering the cell? A cell surface membrane B chloroplasts C cytoplasm D vacuole

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2010

2 Which list shows substances each of which can diffuse into and out of cells? A amino acids, glucose and oxygen B carbon dioxide, cellulose and glucose C carbon dioxide, oxygen and starch D carbon monoxide, oxygen and protein

1 marks

Answer: A

This question in 0653/11 May/June 2011

2 Which list shows substances each of which can diffuse into and out of cells? A amino acids, glucose and oxygen B carbon dioxide, cellulose and glucose C carbon dioxide, oxygen and starch D carbon monoxide, oxygen and protein

1 marks

Answer: A

This question in 0653/12 May/June 2011

7 When a leaf is photosynthesising, in which direction do gases diffuse through the stomata? carbon dioxide oxygen A in in B in out C out in D out out

1 marks

Answer: B

This question in 0653/11 Oct/Nov 2011

5 When a leaf is photosynthesising, in which direction do gases diffuse through the stomata? carbon dioxide oxygen A in in B in out C out in D out out

1 marks

Answer: B

This question in 0653/12 Oct/Nov 2011

2 The diagram shows two cells in contact with one another, and the concentrations of glucose and salt in each of the cells. glucose 9 arbitrary units glucose 12 arbitrary units salt 10 arbitrary units salt 4 arbitrary units cell L cell M Which movements would occur by diffusion? A glucose from cell L to cell M, salt from M to L B glucose and salt from L to M C glucose from cell M to cell L, salt from L to M D glucose and salt from M to L

1 marks

This question in 0653/11 May/June 2012

6 Which process in the human body does not depend on energy from respiration? A cell division B diffusion C muscle contraction D passage of a nerve impulse

1 marks

This question in 0653/11 May/June 2012

1 Which substance can enter a plant cell by diffusion? A carbon dioxide B cellulose C protein D starch

1 marks

Answer: A

This question in 0653/12 May/June 2013

2 Which substance can enter a plant cell by diffusion? A carbon dioxide B cellulose C protein D starch

1 marks

Answer: A

This question in 0653/13 May/June 2013

2 The diagram shows a leaf in sunlight and some of the substances that diffuse into and out of it. water vapour carbon oxygen dioxide Which of the following has a higher concentration outside the leaf than inside the leaf? A carbon dioxide only B carbon dioxide and oxygen C oxygen and water vapour D water vapour only

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2013

2 The diagram shows a leaf in sunlight and some of the substances that diffuse into and out of it. water vapour carbon oxygen dioxide Which of the following has a higher concentration outside the leaf than inside the leaf? A carbon dioxide only B carbon dioxide and oxygen C oxygen and water vapour D water vapour only

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2013

2 The diagram shows a leaf in sunlight and some of the substances that diffuse into and out of it. water vapour carbon oxygen dioxide Which of the following has a higher concentration outside the leaf than inside the leaf? A carbon dioxide only B carbon dioxide and oxygen C oxygen and water vapour D water vapour only

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2013

2 What causes oxygen to diffuse into the blood from an alveolus in the lungs? A The oxygen concentration in the alveolus is higher than in the atmosphere. B The oxygen concentration in the alveolus is lower than in the blood. C The oxygen concentration in the atmosphere is higher than the carbon dioxide concentration. D The oxygen concentration in the blood is lower than in the alveolus.

1 marks

Answer: D

This question in 0653/11 May/June 2014

2 What causes oxygen to diffuse into the blood from an alveolus in the lungs? A The oxygen concentration in the alveolus is higher than in the atmosphere. B The oxygen concentration in the alveolus is lower than in the blood. C The oxygen concentration in the atmosphere is higher than the carbon dioxide concentration. D The oxygen concentration in the blood is lower than in the alveolus.

1 marks

Answer: D

This question in 0653/12 May/June 2014

4 What causes oxygen to diffuse into the blood from an alveolus in the lungs? A The oxygen concentration in the alveolus is higher than in the atmosphere. B The oxygen concentration in the alveolus is lower than in the blood. C The oxygen concentration in the atmosphere is higher than the carbon dioxide concentration. D The oxygen concentration in the blood is lower than in the alveolus.

1 marks

Answer: D

This question in 0653/13 May/June 2014

3 Two samples of air are placed in a sealed container, as shown. high low oxygen oxygen concentration concentration partition LEFT RIGHT The partition is removed. What will be the situation in the container one hour later? A All the oxygen molecules have stopped moving. B Oxygen molecules are moving in all directions. C There will be a higher concentration of oxygen on the left than on the right. D There will be a higher concentration of oxygen on the right than on the left.

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2014

3 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/11 May/June 2015

3 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/12 May/June 2015

3 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/13 May/June 2015

2 Which process depends on diffusion? A circulation B digestion C gaseous exchange D phagocytosis

1 marks

Answer: C

This question in 0653/12 Oct/Nov 2015

3 A student carries out an experiment to investigate diffusion. Two dyes are injected into the middle of a sealed tube of water. The diagram shows the particles of dye in the tube just after the dyes are injected. injection point bung dye 1 water dye 2 The tube is left for an hour. Which diagram shows the distribution of the particles of dye after this time? A B C D

1 marks

Answer: C

This question in 0653/13 Oct/Nov 2015

3 Which statement about diffusion of water is not correct? A Diffusion of water takes place only in liquids. B Diffusion of water relies on the random movement of the water molecules. C Water molecules are small enough to diffuse through cell membranes. D Water molecules are small enough to diffuse through cell walls.

1 marks

Answer: A

This question in 0653/11 May/June 2016

3 Which process depends on diffusion? A egestion B fertilisation C phagocytosis D transpiration

1 marks

Answer: D

This question in 0653/12 May/June 2016

3 Which statement about diffusion is correct? A Diffusion happens only in living organisms. B Diffusion happens only through a cell wall. C Diffusion occurs only down a concentration gradient. D Diffusion occurs only in solution.

1 marks

Answer: C

This question in 0653/13 May/June 2016

2 The diagrams represent four similar animal cells immersed in blood plasma. The black dots represent molecules of dissolved oxygen. Which cell will have oxygen molecules diffusing into it most rapidly? A B C D

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2016

2 How do molecules move when they are involved in the process of diffusion? A They all move from a high to a low concentration. B They all move from a low to a high concentration. C They all move randomly. D They show net movement against a concentration gradient.

1 marks

Answer: C

This question in 0653/12 Oct/Nov 2016

2 How does carbon dioxide move out of the cells that form the walls of the alveoli into the surrounding air? A absorption B breathing C diffusion D respiration

1 marks

Answer: C

This question in 0653/13 Oct/Nov 2016

2 What is the correct description of diffusion? A a controlled movement of molecules against a concentration gradient B a controlled movement of molecules down a concentration gradient C a random movement of molecules against a concentration gradient D a random movement of molecules down a concentration gradient

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2017

2 Which process depends on diffusion? A circulation B digestion C gaseous exchange D phagocytosis

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2018

2 Which process depends on diffusion? A circulation B digestion C gaseous exchange D phagocytosis

1 marks

Answer: C

This question in 0653/12 Oct/Nov 2018

2 Which process depends on diffusion? A circulation B digestion C gaseous exchange D phagocytosis

1 marks

Answer: C

This question in 0653/13 Oct/Nov 2018

2 What is a definition of the net movement of molecules by diffusion? A movement down a concentration gradient from a higher to lower concentration B movement down a concentration gradient from a lower to higher concentration C movement up a concentration gradient from a higher to lower concentration D movement up a concentration gradient from a lower to higher concentration

1 marks

Answer: A

This question in 0653/12 May/June 2019

2 Which is the correct description of diffusion? A net movement of particles from a region of higher concentration to a region of lower concentration down a concentration gradient B net movement of particles from a region of higher concentration to a region of lower concentration against a concentration gradient C net movement of particles from a region of lower concentration to a region of higher concentration down a concentration gradient D net movement of particles from a region of lower concentration to a region of higher concentration against a concentration gradient

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2019

6 The diagram shows an alveolus and a blood capillary. 2 1 4 3 Which two arrows represent gas exchange by diffusion only? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2019

6 The diagram shows an alveolus and a blood capillary. 2 1 4 3 Which two arrows represent gas exchange by diffusion only? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: D

This question in 0653/13 Oct/Nov 2019

3 Diagram 1 represents a solution of glucose which has had some protein molecules added. Diagram 2 represents the result after four hours. 1 2 glucose molecule protein molecule Which process is responsible for this result? A absorption B diffusion C digestion D osmosis

1 marks

Answer: B

This question in 0653/12 Feb/March 2020

3 Particles move from one area to another by diffusion. Which row is correct about this movement? concentration of concentration of particles in area particles in area movement from which they to which they of molecules move move A high high in a pattern B high low random C low high random D low low in a pattern

1 marks

Answer: B

This question in 0653/12 Oct/Nov 2020

1 The diagram shows two red blood cells inside a capillary and two tissue cells near this capillary. red blood cell tissue cell How does the oxygen in the red blood cells reach the tissue cells? A by absorption B by diffusion C by respiration D by transpiration

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2020

2 The diagrams represent four similar animal cells immersed in blood plasma. The black dots represent molecules of dissolved oxygen. Which cell will have oxygen molecules diffusing into it most rapidly? A B C D

1 marks

Answer: C

This question in 0653/11 May/June 2021

2 The diagrams represent four similar animal cells immersed in blood plasma. The black dots represent molecules of dissolved oxygen. Which cell will have oxygen molecules diffusing into it most rapidly? A B C D

1 marks

Answer: C

This question in 0653/12 May/June 2021

1 The diagrams represent four similar animal cells immersed in blood plasma. The black dots represent molecules of dissolved oxygen. Which cell will have oxygen molecules diffusing into it most rapidly? A B C D

1 marks

Answer: C

This question in 0653/13 May/June 2021

3 What is the definition of diffusion? A the downward movement of particles in the atmosphere B the movement of particles down a concentration gradient C the movement of molecules against a concentration gradient D the movement of particles from a hotter to a cooler region

1 marks

Answer: B

This question in 0653/13 May/June 2022

3 By which process do substances move into and out of cells? A diffusion B egestion C evaporation D transpiration

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2022

2 What is diffusion? A net movement of molecules down a concentration gradient B net movement of molecules up a concentration gradient C total movement of molecules down a concentration gradient D total movement of molecules up a concentration gradient

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2023

7 By which process does water vapour move out of plant leaves through stomata? A diffusion B evaporation C osmosis D respiration

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2023

2 A drop of red ink is injected into the centre of a test-tube containing gelatine. Gelatine is a clear substance that allows ink particles to diffuse through it. The diagram shows the test-tube at the start of the experiment. gelatine drop of red ink centre of test-tube Which diagram correctly shows the appearance of the test-tube after a period of time? A B C D key area containing red ink

1 marks

Answer: D

This question in 0653/11 May/June 2024

7 The diagram shows a section through a leaf. The arrows represent the movement of water by diffusion, evaporation or osmosis. 4 3 2 1 Which arrows represent diffusion and evaporation? diffusion evaporation A 1 2 B 2 3 C 3 4 D 4 1

1 marks

Answer: A

This question in 0653/11 May/June 2024

3 What are features of diffusion? net movement of requires a particles from a higher partially permeable to a lower concentration membrane v Jv key /=yes 0 0O WwW D> Jv x x Jv X=no x x

1 marks

Answer: B

This question in 0653/13 May/June 2024

2 The diagram shows two red blood cells inside a capillary and two tissue cells near this capillary. red blood cell tissue cell How does the oxygen in the red blood cells reach the tissue cells? A by absorption B by diffusion C by respiration D by transpiration

1 marks

Answer: B

This question in 0653/12 Oct/Nov 2024

2 The diagram shows two red blood cells inside a capillary and two tissue cells near this capillary. red blood cell tissue cell How does the oxygen in the red blood cells reach the tissue cells? A by absorption B by diffusion C by respiration D by transpiration

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2024

3 Oxygen gas moves into red blood cells from the alveoli. What is this process? A diffusion B evaporation C osmosis D transpiration

1 marks

Answer: A

This question in 0653/12 May/June 2025