Respiration — Paper 1 · IGCSE Biology (9-1) 0970

1 All living organisms release energy from nutrient molecules within their cells. What is the name of this characteristic? A growth B nutrition C respiration D sensitivity

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2018

23 The diagram shows two experiments investigating gas exchange in small aerobic crustaceans. Soda lime absorbs carbon dioxide. P Q coloured coloured liquid marker liquid marker small aerobic crustaceans wire gauze soda lime glass beads instead of soda lime Which way does the liquid marker move? P Q A left right B left stays still C right left D right stays still

1 marks

Answer: B

This question in 0970/11 May/June 2019

24 Yeast is placed inside a container full of a glucose solution with no air. Which word equation summarises the process that takes place inside the container? A glucose → ethanol + carbon dioxide B glucose → lactic acid C glucose + oxygen → carbon dioxide + water D glucose + oxygen → ethanol

1 marks

Answer: A

This question in 0970/11 May/June 2019

20 When is respiration carried out by green plants? A at all times B at dusk and dawn only C during the night only D never

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2019

10 Four test-tubes are set up as shown. Which test-tube contains the least carbon dioxide after one hour? A B C D black water polythene to keep aquatic out light animal light light light aquatic plant

1 marks

Answer: C

This question in 0970/11 May/June 2020

19 The diagram shows an experiment to investigate the respiration of yeast. Oil prevents oxygen entering the glucose and yeast suspension. delivery tube thin layer of oil bubble of gas glucose and yeast limewater suspension If no oxygen is present in the glucose and yeast suspension, what will occur? A Ethanol will be produced and the limewater will stay clear. B Ethanol will be produced and the limewater will go cloudy. C Lactic acid will be produced and the limewater will stay clear. D Lactic acid will be produced and the limewater will go cloudy.

1 marks

Answer: B

This question in 0970/11 May/June 2020

20 What happens during respiration in germinating seeds? A Seed temperature decreases. B Carbon dioxide is taken up by the seeds. C Glucose is used up by the seeds. D Oxygen is given out by the seeds.

1 marks

Answer: C

This question in 0970/11 May/June 2020

19 The substances listed are associated with aerobic respiration. 1 carbon dioxide 2 glucose 3 oxygen 4 water Which substances are the products of aerobic respiration? A 1 and 3 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0970/12 May/June 2020

23 The list shows some processes that take place in a human body. 1 production of new red blood cells 2 transmission of nerve impulses from the eyes to the brain 3 diffusion of gases into and out of the lungs Which processes use energy released by respiration? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: A

This question in 0970/11 May/June 2021

24 What is produced by anaerobic respiration in humans? alcohol carbon dioxide lactic acid A x Jv Jv key B Jv Jv x /=yes Cc x x v X=no D v x x

1 marks

Answer: C

This question in 0970/11 May/June 2021

23 Which chemicals are needed to release energy in aerobic respiration? A carbon dioxide and glucose B carbon dioxide and water C oxygen and glucose D oxygen and water

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2021

38 Which process releases carbon dioxide into the atmosphere? A decomposition B fossilisation C photosynthesis D transpiration

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2021

1 All living organisms release energy from nutrient molecules within their cells. What is the name of this characteristic? A growth B nutrition C respiration D sensitivity

1 marks

Answer: C

This question in 0970/11 May/June 2022

23 Substances involved in aerobic respiration are listed. 1 carbon dioxide 2 glucose 3 oxygen 4 water Which substances are used during aerobic respiration? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: C

This question in 0970/11 May/June 2022

1 All living organisms release energy from nutrient molecules within their cells. What is the name of this characteristic? A growth B nutrition C respiration D sensitivity

1 marks

Answer: C

This question in 0970/12 May/June 2022

23 Which process could continue without energy from respiration? A active transport B growth C osmosis D protein synthesis

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2022

23 The diagram shows the activity of some yeast cells in a sugar solution. sugar solution gas bubble yeast cells limewater Which statement explains what happens to the limewater? A The limewater changes from colourless to cloudy due to the presence of carbon dioxide. B The limewater changes from colourless to cloudy due to the presence of oxygen. C The limewater changes from cloudy to colourless due to the presence of carbon dioxide. D The limewater changes from cloudy to colourless due to the presence of oxygen.

1 marks

Answer: A

This question in 0970/11 May/June 2023

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

1 marks

Answer: B

This question in 0970/11 May/June 2023

10 Which processes depend on the action of enzymes? 1 digestion 2 osmosis 3 respiration A 1 and 2 B 1 and 3 C 1 only D 2 and 3

1 marks

Answer: B

This question in 0970/12 May/June 2023

12 Four test-tubes are set up as shown. Which test-tube contains the least carbon dioxide after one hour? A B C D black water polythene to keep aquatic out light animal light light light aquatic plant

1 marks

Answer: C

This question in 0970/12 May/June 2023

22 Which chemical can be used to show the presence of carbon dioxide gas? A Benedict’s solution B biuret solution C ethanol D limewater

1 marks

Answer: D

This question in 0970/12 May/June 2023

23 The diagram represents the exchange of gases during breathing and during respiration in the body. oxygen oxygen in blood X Y carbon carbon dioxide dioxide in blood What is represented by X? A heart B kidneys C liver D lungs

1 marks

Answer: D

This question in 0970/12 May/June 2023

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

1 marks

Answer: C

This question in 0970/11 May/June 2024

1 Some yeast, sugar and water are mixed in a test-tube. The diagrams show the test-tube at the start and after one hour. bubbles of gas yeast, sugar and water at start after one hour Which process causes this change? A growth B reproduction C respiration D sensitivity

1 marks

Answer: C

This question in 0970/12 May/June 2024

7 The table shows the concentration of gases in a blood vessel and in an alveolus. Which row shows the conditions that cause a substance produced in respiration in humans to diffuse from the blood vessel into the alveolus? substance substance substance produced in concentration in concentration in respiration the blood vessel the alveolus A carbon dioxide low high B carbon dioxide high low C oxygen low high D oxygen high low

1 marks

Answer: B

This question in 0970/11 May/June 2025

35 The diagram shows part of the carbon cycle. carbon dioxide 2 in atmosphere 1 waste products 4 and dead plants organisms animals 3 Which two numbered arrows represent respiration? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0970/12 May/June 2025

9 Which processes in plants transfer energy from light into energy in chemicals? photosynthesis respiration A yes yes B yes no C no yes D no no

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2025