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

5 The diagram shows a plant cell. In which labelled part of the cell is sugar made? D A cell wall vacuole B chloroplast C nucleus

1 marks

Answer: B

This question in 0970/11 May/June 2018

11 The equation for photosynthesis is shown. … 1 … + … 2 … → glucose + … 3 … Which words correctly complete gaps 1, 2 and 3? 1 2 3 A carbon dioxide light oxygen B carbon dioxide water oxygen C oxygen light carbon dioxide D oxygen water carbon dioxide

1 marks

Answer: B

This question in 0970/11 May/June 2018

11 An experiment was carried out using the apparatus shown. The carbon dioxide content of the water in each test-tube was measured at the start and again three hours later. In which test-tube would there be a decrease in carbon dioxide content? A B C D black polythene water to keep out light light light light water plant water snail

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2018

35 The diagram shows part of the carbon cycle. Which arrow represents photosynthesis? carbon dioxide in air D A B C animals burning plants decomposers

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2018

11 The diagram shows an experiment to investigate the balance between respiration and photosynthesis. In which tube are photosynthesis and respiration taking place at the same time? A B C D black water polythene to keep snail out light light light light pond weed

1 marks

Answer: C

This question in 0970/11 May/June 2019

36 What process uses the principal source of energy input to biological systems? A ingestion B decomposition C photosynthesis D respiration

1 marks

Answer: C

This question in 0970/11 May/June 2019

1 The diagrams show a test-tube containing pond water. The green colour is caused by microorganisms that have chloroplasts. oxygen bubble pale green dark green pond water area light off light on Which characteristics of living organisms are shown? A excretion, growth and movement B movement, nutrition and sensitivity C nutrition, reproduction and respiration D reproduction, sensitivity and growth

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2019

10 The diagram shows an experiment investigating the effect of light intensity on an aquatic plant. light light source source 20 cm 10 cm P Q Photosynthesis occurred in both test-tube P and test-tube Q. Both test-tubes were kept at the same temperature. The number of bubbles produced in test-tube P was 12 bubbles per minute. What is the most likely number of bubbles produced in one minute in test-tube Q? A 0 B 3 C 12 D 48

1 marks

Answer: D

This question in 0970/12 Oct/Nov 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

35 The diagram shows a simple food chain. grass → gazelle → lion The arrows show the energy flow through the food chain. Where does the grass obtain its energy? A oxygen from air B water C minerals in soil D the Sun

1 marks

Answer: D

This question in 0970/11 May/June 2020

10 The diagram shows a plant cell. In which part of the cell does photosynthesis occur? A B C D

1 marks

Answer: D

This question in 0970/12 May/June 2020

12 The diagram shows a cell with groups of bacteria around its edge. cell cytoplasm spiral-shaped chloroplast bacteria The bacteria move to areas of high oxygen concentration. Which process in the cell causes the bacteria to form these groups? A digestion B photosynthesis C reproduction D respiration

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2020

13 The graph shows how the percentage of protein found in potatoes was affected by the concentration of nitrate fertiliser added to the crop when it was growing. percentage of protein in potatoes concentration of nitrate fertiliser added These results suggest that greater concentrations of nitrate fertiliser allow the potatoes to make more A amino acids. B cellulose. C lipid. D starch.

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2020

12 A plant with striped leaves was kept in bright light for six hours. white stripe green stripe A leaf was taken from the plant and the chlorophyll was removed. The leaf was then tested for starch using iodine solution. Which diagram shows the result of the test? A B C D yellow-brown white blue-black yellow-brown blue-black blue-black green green

1 marks

Answer: A

This question in 0970/11 May/June 2021

9 In a photosynthesis experiment, a plant is left in bright sunlight for several hours. A leaf is then removed from the plant and tested for starch, using iodine solution. The diagram shows the leaf from the plant that was used in the experiment. white area green area Which diagram shows the result of the experiment? A B C D key iodine solution turns blue-black iodine solution stays brown

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2021

12 Which chemical is a product of photosynthesis that moves out of a green leaf through its stomata? A carbon dioxide B glucose C oxygen D water

1 marks

Answer: C

This question in 0970/11 May/June 2022

36 Which process uses the principal source of energy input to biological systems? A ingestion B decomposition C photosynthesis D respiration

1 marks

Answer: C

This question in 0970/11 May/June 2022

12 Which chemical is a product of photosynthesis that moves out of a green leaf through its stomata? A carbon dioxide B glucose C oxygen D water

1 marks

Answer: C

This question in 0970/12 May/June 2022

36 Which process uses the principal source of energy input to biological systems? A ingestion B decomposition C photosynthesis D respiration

1 marks

Answer: C

This question in 0970/12 May/June 2022

13 The diagram shows an experiment to find out if carbon dioxide is necessary for photosynthesis. The plant is kept in the dark for 48 hours to remove any starch. Then it is set up in the light, as shown. solution that absorbs carbon dioxide After 10 hours, leaves X and Y were tested for starch. What is the expected result? presence of starch in leaf X in leaf Y A Jv Jv key B x x v= present Cc v x X = absent D x v

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2022

12 An experiment is set up to investigate gas exchange in aquatic plants. hydrogencarbonate indicator solution light aquatic plant The hydrogencarbonate indicator solution is orange at the start. Which colour is it after three hours? A blue-black B orange C purple D yellow

1 marks

Answer: C

This question in 0970/11 May/June 2023

13 How are most leaves adapted for photosynthesis? A They have a large surface area and are thick. B They have a large surface area and are thin. C They have a small surface area and are thick. D They have a small surface area and are thin.

1 marks

Answer: B

This question in 0970/11 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

13 Which row shows the uses of some carbohydrates in plants? glucose starch sucrose A cell walls transport energy storage B energy storage cell walls respiration C respiration energy storage transport D transport respiration cell walls

1 marks

Answer: C

This question in 0970/12 May/June 2023

36 Which term is used to describe an organism that makes its own organic nutrients? A carnivore B decomposer C herbivore D producer

1 marks

Answer: D

This question in 0970/12 May/June 2023

37 What is the principal source of energy for most food chains? A carbon dioxide gas B glucose C oxygen D sunlight

1 marks

Answer: D

This question in 0970/12 May/June 2023

12 The diagram shows a cell with groups of bacteria around its edge. cell cytoplasm spiral-shaped chloroplast bacteria The bacteria have moved to areas of high oxygen concentration. Which process in the cell causes the bacteria to form these groups? A digestion B photosynthesis C reproduction D respiration

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2023

13 The graph shows the results of an experiment that investigated the effect of light intensity on the rate of photosynthesis. y-axis x-axis What are the labels for the x-axis and the y-axis? x-axis y-axis A light intensity rate of oxygen production B light intensity rate of carbon dioxide production C rate of carbon light intensity dioxide production D rate of oxygen light intensity production

1 marks

Answer: A

This question in 0970/11 May/June 2024

14 The diagram shows a cross-section of a leaf. Which type of cell controls the entry of carbon dioxide into the leaf? A B C D The table shows vitamins that should be included in a balanced diet.

1 marks

Answer: D

This question in 0970/11 May/June 2024

16 Which substance is an ion that is used to make chlorophyll? A calcium B iron C magnesium D starch

1 marks

Answer: C

This question in 0970/11 May/June 2024

14 The diagram shows two cells. Which process happens in only one of these cells? A controlling the chemical reactions in the cell B controlling the movement of substances into the cell C making starch inside the cell D using glucose inside the cell

1 marks

Answer: C

This question in 0970/12 May/June 2024

13 The equation for photosynthesis is shown. … 1 … + … 2 …  glucose + … 3 … Which words correctly complete gaps 1, 2 and 3? 1 2 3 A carbon dioxide light oxygen B carbon dioxide water oxygen C oxygen light carbon dioxide D oxygen water carbon dioxide

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2024

14 Which carbohydrate is used to make cell walls? A cellulose B glycogen C starch D sucrose

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2024

15 The diagram shows a cross-section of a leaf. X Y Z Which row shows the correct labels? palisade spongy stoma mesophyll cell mesophyll cell A X Y Z B X Z Y C Y X Z D Y Z X

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2024

12 A student drew a diagram to show the substances used and produced in photosynthesis in a leaf. 1 + 2 are used by the leaf 3 + 4 are produced by the leaf Which row shows the correct labels for the diagram? 1 2 3 4 A carbon dioxide glucose oxygen water B water carbon dioxide glucose oxygen C oxygen water carbon dioxide glucose D glucose oxygen water carbon dioxide

1 marks

Answer: B

This question in 0970/11 May/June 2025

4 The diagram shows a plant cell. Which letter identifies where photosynthesis occurs in the cell? A B D C

1 marks

Answer: D

This question in 0970/12 May/June 2025

9 Which substances are used for photosynthesis? A carbon dioxide and glucose B carbon dioxide and water C glucose and oxygen D glucose and water

1 marks

Answer: B

This question in 0970/12 May/June 2025

10 What happens when a plant lacks magnesium ions? chlorophyll colour of leaves production produced A decreases green B decreases yellow C increases green D increases yellow

1 marks

Answer: B

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

34 Which arrow represents respiration in plants? carbon dioxide dissolved in seas and lakes carbon dioxide gas in the air A B C D carbon compounds carbon fossil in decaying compounds fuels organisms in plants carbon compounds in animals

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2025