Respiration — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

8 Which substances are used and produced in aerobic respiration? carbon oxygen glucose water dioxide A produced used produced used B produced used used produced C used produced produced used D used produced used produced

1 marks

Answer: B

This question in 0973/11 May/June 2019

10 An experiment using germinating seeds is set up as shown, and left at room temperature for 12 hours. to pump solution P solution Q germinating damp peas cotton wool The pump is then switched on and air is drawn through the apparatus for 2 minutes. Which row identifies solutions P and Q and the results obtained? solution P solution P results solution Q solution Q results A ethanol remains colourless ethanol turns milky B ethanol turns milky limewater remains colourless C limewater remains colourless limewater turns milky D limewater turns milky ethanol remains colourless

1 marks

Answer: C

This question in 0973/11 May/June 2020

8 Some students investigated aerobic respiration in woodlice. They set up the apparatus as shown. air in air out limewater X Y woodlice After 1 hour they recorded the appearance of the limewater in X and Y. Which row is correct for the appearance of X and Y? X Y A milky milky B milky clear C clear milky D clear clear

1 marks

Answer: C

This question in 0973/12 May/June 2020

1 What is respiration? A breakdown of food by enzymes in the alimentary canal B breathing to supply oxygen to cells C release of carbon dioxide from the lungs D release of energy for body activities

1 marks

Answer: D

This question in 0973/11 May/June 2021

1 What is respiration? A breakdown of food by enzymes in the alimentary canal B breathing to supply oxygen to cells C release of carbon dioxide from the lungs D release of energy for body activities

1 marks

Answer: D

This question in 0973/12 May/June 2021

1 All living organisms can break down nutrient molecules to release energy. What is this process? A excretion B growth C nutrition D respiration

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2021

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

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2021

8 What are the products of aerobic respiration? 1 carbon dioxide 2 glucose 3 water A 1 and 2 only B 1 and 3 only C 1, 2 and 3 D 2 and 3 only

1 marks

Answer: B

This question in 0973/11 May/June 2022

13 The diagram shows part of the carbon cycle. Which arrow represents plant respiration? carbon compounds A in the air B carbon compounds carbon compounds in plants C in rocks, sea and soil D carbon compounds in animals

1 marks

Answer: B

This question in 0973/12 May/June 2022

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

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2022

8 The diagram shows apparatus used to investigate respiration of blowfly larvae. Air is sucked through the solutions of hydrogencarbonate indicator as shown. Hydrogencarbonate indicator turns orange with carbon dioxide at atmospheric concentration. It turns yellow with high carbon dioxide concentration. direction direction of air of air hydrogencarbonate hydrogencarbonate indicator indicator flask X flask Y What are the colours of the hydrogencarbonate indicator in the flasks after 24 hours? flask X flask Y A orange orange B orange yellow C yellow orange D yellow yellow

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2022

1 What is meant by respiration? A protein synthesis B sweating to lose heat C the function of lungs D the release of energy

1 marks

Answer: D

This question in 0973/11 May/June 2023

8 During cold weather, warm blooded animals, such as mammals and birds, require more food. Which statement explains the reason for this? energy required to rate of maintain constant respiration body temperature A high high B high low C low high D low low

1 marks

Answer: A

This question in 0973/12 May/June 2023

1 Which characteristic of a living organism releases energy for growth? A excretion B reproduction C respiration D sensitivity

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2023

8 The apparatus shown is set up and left for 10 minutes. The insects are able to move around in the test-tube but the wire mesh prevents them from falling into the sodium hydroxide. graduated scale thermometer coloured oil droplet water bath insects wire mesh sodium hydroxide (to absorb carbon dioxide) In which direction does the oil droplet move and why? direction of effect of respiration oil droplet of insects A to the left use up carbon dioxide and release oxygen B to the left use up oxygen and release carbon dioxide C to the right use up carbon dioxide and release oxygen D to the right use up oxygen and release carbon dioxide

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2023

12 In a food chain, what do all living organisms get from their food? A a supply of water B oxygen for respiration C protection from disease D the energy they need

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2023

8 The list shows some processes that occur in the body. 1 cell division 2 oxygen diffusion 3 protein synthesis 4 temperature regulation Which processes use energy released by respiration? A 1, 3 and 4 B 1 and 2 C 2, 3 and 4 D 3 and 4 only

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2024

1 Which characteristic of living organisms is described as the chemical reactions in cells that break down nutrient molecules and release energy? A excretion B nutrition C photosynthesis D respiration

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2025