Respiration — Paper 2 · IGCSE Science - Combined 0653

7 Which row is correct for aerobic respiration? relative amount of gas used energy released A large carbon dioxide B large oxygen C small carbon dioxide D small oxygen

1 marks

Answer: B

This question in 0653/22 Feb/March 2017

1 Process Q happens in cells. carbohydrates → process Q → energy released What is process Q? A growth B nutrition C respiration D sensitivity

1 marks

Answer: C

This question in 0653/21 May/June 2017

8 Which molecule contains the energy that is released in aerobic respiration? A C6H12O6 B CO2 C H2O D O2

1 marks

Answer: A

This question in 0653/21 May/June 2017

8 What is the equation for aerobic respiration? A 6CO2 + 6O2 → C6H12O6 + 6H2O B 6H2O + 6CO2 → C6H12O6 + 6O2 C C6H12O6 + 6H2O → 6CO2 + 6O2 D C6H12O6 + 6O2 → 6CO2 + 6H2O

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2017

3 Which substance is produced by respiration in microorganisms during yoghurt making? A amino acids B fatty acids C hydrochloric acid D lactic acid

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2017

9 During aerobic respiration of glucose, oxygen is used up and water is produced. How many molecules of oxygen are used and how many molecules of water are produced when one molecule of glucose is respired? number of number of molecules of molecules of oxygen used water produced A 1 1 B 1 6 C 6 1 D 6 6

1 marks

Answer: D

This question in 0653/22 Feb/March 2018

1 Most cars burn fossil fuels to release energy for their movement. Which characteristic of living organisms is similar to this? A excretion B growth C nutrition D respiration

1 marks

Answer: D

This question in 0653/21 May/June 2018

7 What is the maximum number of carbon dioxide molecules produced when four glucose molecules are used in aerobic respiration? A 6 B 12 C 24 D 48

1 marks

Answer: C

This question in 0653/21 May/June 2018

7 What is the maximum number of carbon dioxide molecules produced when four glucose molecules are used in aerobic respiration? A 6 B 12 C 24 D 48

1 marks

Answer: C

This question in 0653/22 May/June 2018

8 What is the maximum number of carbon dioxide molecules produced when four glucose molecules are used in aerobic respiration? A 6 B 12 C 24 D 48

1 marks

Answer: C

This question in 0653/23 May/June 2018

8 Aerobic respiration is the release of a relatively … X … amount of energy by the breakdown of food substances in the presence of … Y … . Which words complete the gaps X and Y? X Y A large carbon dioxide B large oxygen C small carbon dioxide D small oxygen

1 marks

Answer: B

This question in 0653/21 Oct/Nov 2018

8 Six molecules of glucose are aerobically respired in an animal cell. How many molecules of carbon dioxide are released in this process? A 1 B 6 C 12 D 36

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2018

10 In an investigation, four test-tubes containing seeds were set up as shown in the diagram. After several days, which test-tube will contain the most germinated seeds? A B C D dry cotton wool black box seeds seeds gauze damp damp solution dry cotton cotton that cotton wool wool absorbs wool 1 °C 20 °C 20 °C 1 °C oxygen

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2018

7 What are the reactants in aerobic respiration? A carbon dioxide and oxygen B carbon dioxide and water C glucose and oxygen D glucose and water

1 marks

Answer: C

This question in 0653/22 Feb/March 2019

7 Which word equation represents aerobic respiration? A carbon dioxide + glucose → oxygen + water B glucose + oxygen → carbon dioxide + water C oxygen + water → carbon dioxide + glucose D water + carbon dioxide → glucose + oxygen

1 marks

Answer: B

This question in 0653/21 May/June 2019

7 Which statement about aerobic respiration is correct? A It exchanges gases through the walls of the alveoli. B It expels carbon dioxide from the lungs. C It only produces carbon dioxide and energy. D It uses oxygen to release energy from glucose.

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2019

7 Which statement about aerobic respiration is correct? A It exchanges gases through the walls of the alveoli. B It expels carbon dioxide from the lungs. C It only produces carbon dioxide and energy. D It uses oxygen to release energy from glucose.

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2019

6 Which statement about aerobic respiration is correct? A It exchanges gases through the walls of the alveoli. B It expels carbon dioxide from the lungs. C It only produces carbon dioxide and energy. D It uses oxygen to release energy from glucose.

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2019

8 What is the equation for aerobic respiration? A carbon dioxide + water → glucose + oxygen B glucose + oxygen → carbon dioxide + water C glucose + water → carbon dioxide + oxygen D oxygen + water → carbon dioxide + glucose

1 marks

Answer: B

This question in 0653/22 Feb/March 2020

7 Which shows the balanced chemical equation for aerobic respiration? A 6CO2 + C6H12O6  6O2 + 6H2O B 6CO2 + 6H2O  C6H12O6 + 6O2 C C6H12O6 + 6O2  6CO2 + 6H2O D 6O2 + 6H2O  6CO2 + C6H12O6

1 marks

Answer: C

This question in 0653/23 Oct/Nov 2020

7 What is the maximum number of carbon dioxide molecules produced when four glucose molecules are used in aerobic respiration? A 6 B 12 C 24 D 48

1 marks

Answer: C

This question in 0653/21 May/June 2021

8 What is the maximum number of carbon dioxide molecules produced when four glucose molecules are used in aerobic respiration? A 6 B 12 C 24 D 48

1 marks

Answer: C

This question in 0653/22 May/June 2021

8 What is the maximum number of carbon dioxide molecules produced when four glucose molecules are used in aerobic respiration? A 6 B 12 C 24 D 48

1 marks

Answer: C

This question in 0653/23 May/June 2021

1 Movement is a characteristic of all living organisms. Which two other characteristics of living organisms provide the energy for movement? A excretion and nutrition B growth and sensitivity C nutrition and respiration D respiration and growth

1 marks

Answer: C

This question in 0653/21 Oct/Nov 2021

1 Movement is a characteristic of all living organisms. Which two other characteristics of living organisms provide the energy for movement? A excretion and nutrition B growth and sensitivity C nutrition and respiration D respiration and growth

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2021

8 The graph shows the rate and depth of breathing of a student at rest. volume of air in the lungs 0 time / s 15 Which graph shows the rate and depth of breathing of the student immediately after five minutes of physical activity? A B volume of air volume of air in the lungs in the lungs 0 time / s 15 0 time / s 15 C D volume of air volume of air in the lungs in the lungs 0 time / s 15 0 time / s 15

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2021

1 Movement is a characteristic of all living organisms. Which two other characteristics of living organisms provide the energy for movement? A excretion and nutrition B growth and sensitivity C nutrition and respiration D respiration and growth

1 marks

Answer: C

This question in 0653/23 Oct/Nov 2021

8 In the equation for respiration shown, the components have been represented by numbers. 1 + 2  3 + 4 Each component has been given a letter, as shown. W = carbon dioxide, X = glucose, Y = oxygen, Z = water Which letter should be inserted into each position in the equation? 1 2 3 4 A W Y X Z B W Z X Y C X Y W Z D X Z W Y

1 marks

Answer: C

This question in 0653/22 Feb/March 2022

9 What is the word equation for aerobic respiration? A carbon dioxide + chlorophyll  glucose + oxygen B carbon dioxide + glucose  oxygen + water C glucose + oxygen  carbon dioxide + water D oxygen + light energy  carbon dioxide + water

1 marks

Answer: C

This question in 0653/21 Oct/Nov 2022

8 What is the word equation for aerobic respiration? A carbon dioxide + chlorophyll  glucose + oxygen B carbon dioxide + glucose  oxygen + water C glucose + oxygen  carbon dioxide + water D oxygen + light energy  carbon dioxide + water

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2022

13 The concentration of nitrate ions in a lake increases. Why does this result in a decrease in the number of fish in the lake? A There is a decrease in the decomposition of producers. B There is a decrease in the growth of producers. C There is an increase in aerobic respiration by decomposers. D There is an increase in dissolved oxygen.

1 marks

Answer: C

This question in 0653/22 Feb/March 2023

1 Which characteristic of living organisms involves chemical reactions in cells that break down nutrient molecules and release energy? A excretion B nutrition C respiration D sensitivity

1 marks

Answer: C

This question in 0653/21 May/June 2023

9 Which molecule contains the energy that is released in aerobic respiration? A C6H12O6 B CO2 C H2O D O2

1 marks

Answer: A

This question in 0653/21 May/June 2023

9 In respiration, glucose is broken down to release energy. Which row states how humans could use this energy? keep a constant body temperature muscle contraction protein synthesis key / = true X = false

1 marks

Answer: A

This question in 0653/22 May/June 2023

8 Which processes require energy? 1 growth 2 maintenance of body temperature 3 protein synthesis A 1, 2 and 3 B 1 only C 2 and 3 only D 3 only

1 marks

Answer: A

This question in 0653/23 May/June 2023

9 Six molecules of glucose are aerobically respired in an animal cell. How many molecules of carbon dioxide are released in this process? A 1 B 6 C 12 D 36

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2023

9 A student sets up the experiment shown. oil layer limewater living animal Which statement is correct? A The limewater stays colourless because decomposition is occurring. B The limewater stays colourless because photosynthesis is occurring. C The limewater turns milky because aerobic respiration is occurring. D The limewater turns milky because photosynthesis is occurring.

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2023

13 The diagram shows part of the carbon cycle. carbon dioxide in air 3 carbon compounds 4 in animals 1 2 carbon compounds in plants Where does respiration occur? A 1 only B 2 and 3 C 3 and 4 D 3 only

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2023

8 What is the correct balanced equation for aerobic respiration? A C6H12O6 + 2O2  4CO2 + 6H2O B C6H12O6 + 4O2  6CO2 + 4H2O C C6H12O6 + 6O2  6CO2 + 2H2O D C6H12O6 + 6O2  6CO2 + 6H2O

1 marks

Answer: D

This question in 0653/22 Feb/March 2024

6 Which processes use the energy released by respiration? 0 ONO WwW > diffusion «x «KM KK growth «~x QM OSs osmosis \ « & x protein synthesis x \ \ x key /=yes X =no

1 marks

Answer: C

This question in 0653/21 May/June 2024

7 Molecules from the balanced chemical equation for aerobic respiration are listed. 1 C6H12O6 2 6CO2 3 6H2O 4 6O2 What represents the correct equation for aerobic respiration using these molecules? A 1 + 2  3 + 4 B 2 + 3  1 + 4 C 1 + 4  2 + 3 D 3 + 4  1 + 2

1 marks

Answer: C

This question in 0653/21 May/June 2024

9 Why do cells respire? A to produce oxygen B to produce water C to release energy D to use glucose

1 marks

Answer: C

This question in 0653/23 May/June 2024

9 Which row completes the balanced chemical equation for aerobic respiration? C6H12O6 + … 1 …  … 2 … + … 3 … 1 2 3 A 6H2O 6O2 6CO2 B 6O2 6CO2 3H2O C 3O2 6CO2 3H2O D 6O2 6H2O 6CO2

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2024

8 The incomplete equation for aerobic respiration is shown. X + oxygen  carbon dioxide + water What is the formula of X? A C6H6O12 B C6H12O6 C C12H12O6 D 6CH12O6

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2024

10 Which molecule is broken down in aerobic respiration? A starch B glucose C glycogen D water

1 marks

Answer: B

This question in 0653/22 Feb/March 2025

8 Which row describes aerobic respiration? nutrient molecules roduces water releases ener broken down p gy Jv key x v = true v X = false v

1 marks

Answer: A

This question in 0653/21 May/June 2025

1 Movement is a characteristic of all living organisms. Which two other characteristics of living organisms provide the energy for movement? A excretion and nutrition B growth and sensitivity C nutrition and respiration D respiration and growth

1 marks

Answer: C

This question in 0653/22 May/June 2025

6 Four tubes that contain red hydrogencarbonate indicator are set up as shown. After five hours, the colour of the hydrogencarbonate indicator is recorded. aquatic plant hydrogencarbonate indicator in light in light in dark in dark 1 2 3 4 Which row shows the colour of the hydrogencarbonate indicator in each tube after five hours? 1 2 3 4 A purple red red red B purple red yellow red C red yellow red purple D yellow red purple red

1 marks

Answer: B

This question in 0653/22 May/June 2025

11 The graphs show how the rate and depth of breathing varies when a student does four different activities. Which graph shows when the student is most active? A B volume of volume of air in lungs air in lungs 0 0 0 10 20 0 10 20 time / s time / s C D volume of volume of air in lungs air in lungs 0 0 0 10 20 0 10 20 time / s time / s

1 marks

Answer: D

This question in 0653/22 May/June 2025

6 An aquatic plant is in a test-tube of water. The test-tube is sealed and placed in the dark. water aquatic plant Which changes occur to the concentration of carbon dioxide and oxygen in the water after two hours? concentration of concentration of carbon dioxide oxygen A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 0653/23 May/June 2025

10 What is the balanced symbol equation for aerobic respiration? A 6CO2 + C6H12O6  6O2 + 6H2O B 6CO2 + 6H2O  C6H12O6 + 6O2 C C6H12O6 + 6O2  6CO2 + 6H2O D 6O2 + 6H2O  6CO2 + C6H12O6

1 marks

Answer: C

This question in 0653/21 Oct/Nov 2025

12 What happens to breathing in humans during exercise? depth of breathing rate of breathing A increases increases B increases no change C no change increases D no change no change

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2025