Photosynthesis — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

4 An experiment is set up as shown to investigate starch production in the leaves of a plant. After six hours in sunlight, leaf Y is tested for starch. leaf Y paper strip on each side of leaf There is no starch produced under the paper strip because there was an absence of A carbon dioxide. B chlorophyll. C light. D oxygen.

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2006

12 Which process converts energy into a form that can be used by all living organisms? A decomposition B denitrification C digestion D photosynthesis

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2006

4 What is used to remove the colour from a leaf in the starch test? A alcohol (methylated spirits) B cold water C hot water D iodine solution

1 marks

Answer: A

This question in 0654/11 May/June 2007

2 The diagram shows a cork pinned to a leaf of a plant which is then exposed to light for 8 hours. green cork white The leaf is then removed from the plant and a starch test carried out on it. Which diagram shows the result of this starch test? A B C D brown brown brown brown blue/black blue/black blue/black blue/black

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2007

3 Which diagram shows how plants obtain chemicals for making proteins? A B rainwater containing dissolved carbon dioxide nitrogen compounds and nitrogen in air C D soil level soil level nitrate ions in water oxygen and nitrogen

1 marks

Answer: C

This question in 0654/11 May/June 2008

3 The diagram shows an experiment to investigate photosynthesis. Potassium hydroxide absorbs carbon dioxide. cotton wool with vaseline to seal leaf L the flask leaf M potassium hydroxide water After standing in sunlight for 10 hours, leaf L contained no starch but leaf M contained a lot of starch. What does this show? A A leaf cannot make starch in a sealed flask. B A leaf cannot make starch without carbon dioxide. C A leaf cannot make starch without light. D A leaf cannot make starch without oxygen.

1 marks

Answer: B

This question in 0654/11 May/June 2009

3 The diagram shows a cross section of a leaf. 1 2 3 4 5 In which two parts of the leaf does photosynthesis take place? A 1 and 3 B 2 and 3 C 3 and 4 D 4 and 5

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2009

3 A plant, each leaf of which is green and white, is destarched. It is then placed in light with black paper over part of one leaf as shown. white area green area black paper After 12 hours, the leaf is tested for starch using iodine solution. The diagram below shows the leaf after this test. black area orange / brown area Where has photosynthesis occurred? A all areas covered by black paper B all areas not covered by black paper C green areas covered by black paper D green areas not covered by black paper

1 marks

Answer: D

This question in 0654/11 May/June 2010

10 A plant, each leaf of which is green and white, is destarched. It is then placed in light with black paper over part of one leaf as shown. white area green area black paper After 12 hours, the leaf is tested for starch using iodine solution. The diagram below shows the leaf after this test. black area orange / brown area Where has photosynthesis occurred? A all areas covered by black paper B all areas not covered by black paper C green areas covered by black paper D green areas not covered by black paper

1 marks

Answer: D

This question in 0654/12 May/June 2010

3 The diagram shows a leaf, still attached to a plant, with both green and white regions that have been partly covered with black paper. The leaf is left in bright light for six hours and then tested for starch. Which area of the leaf turns blue-black after the starch test? A B C green area white area D black paper

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2010

4 The diagram shows a leaf, still attached to a plant, with both green and white regions that have been partly covered with black paper. The leaf is left in bright light for six hours and then tested for starch. Which area of the leaf turns blue-black after the starch test? A B C green area white area D black paper

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2010

4 The diagram shows a leaf, still attached to a plant, with both green and white regions that have been partly covered with black paper. The leaf is left in bright light for six hours and then tested for starch. Which area of the leaf turns blue-black after the starch test? A B C green area white area D black paper

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2010

2 The diagram shows a section through a leaf. Which layer of cells produces most sugar? A B C D

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2011

4 Why is a leaf first dipped into hot water when performing the starch test? A to make its membranes permeable B to make starch soluble C to remove air from intercellular spaces D to remove chlorophyll

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2011

3 The diagram shows a section through a leaf. Which layer of cells produces most sugar? A B C D

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2011

5 Why is a leaf first dipped into hot water when performing the starch test? A to make its membranes permeable B to make starch soluble C to remove air from intercellular spaces D to remove chlorophyll

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2011

1 The diagram shows a section through a leaf. Which layer of cells produces most sugar? A B C D

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2011

6 Why is a leaf first dipped into hot water when performing the starch test? A to make its membranes permeable B to make starch soluble C to remove air from intercellular spaces D to remove chlorophyll

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2011

2 What happens in photosynthesis? A Carbon dioxide is made. B Oxygen is used. C Starch is absorbed. D Water is used.

1 marks

Answer: D

This question in 0654/11 May/June 2012

3. A plant has leaves which are green and white. One of the leaves is partly covered on both sides by a piece of black card. The plant is left under a lamp for two days. 5 7 green part of the leaf 7 white part of the leaf position of black card The leaf is then removed from the plant and tested for starch (the carbohydrate made during photosynthesis). Which row is correct? WwW key / = starch present X = starch absent K « «& x TN x << & </lx i ES 0 Oo WwW PY x «KS

1 marks

Answer: B

This question in 0654/12 May/June 2012

3. A plant has leaves which are green and white. One of the leaves is partly covered on both sides by a piece of black card. The plant is left under a lamp for two days. 5 7 green part of the leaf , white part of the leaf position of black card The leaf is then removed from the plant and tested for starch (the carbohydrate made during photosynthesis). Which row is correct? WwW key / = starch present X = starch absent K « «& x TN x << & </lx i ES 0 Oo WwW PY x «KS

1 marks

Answer: B

This question in 0654/13 May/June 2012

13 The diagram shows part of the carbon cycle. During which stage is oxygen produced? carbon dioxide in the air A D carbohydrates, fats and proteins in dead B animals and plants carbon compounds C in fuels, e.g. peat and coal death carbohydrates, fats death and proteins in animals carbohydrates and proteins in green plants

1 marks

Answer: C

This question in 0654/13 May/June 2013

5 Why are green plants called producers? A They can make oxygen from sunlight. B They form organic nutrients from simple substances. C They have cells containing chlorophyll. D They produce starch from sugar.

1 marks

Answer: B

This question in 0654/11 May/June 2014

6 During photosynthesis, where does most of the carbon dioxide and water enter a leaf? carbon dioxide water A through cuticle in phloem B through cuticle in xylem C through stomata in phloem D through stomata in xylem

1 marks

Answer: D

This question in 0654/12 May/June 2014

4 Why are green plants called producers? A They can make oxygen from sunlight. B They form organic nutrients from simple substances. C They have cells containing chlorophyll. D They produce starch from sugar.

1 marks

Answer: B

This question in 0654/13 May/June 2014

4 What is the correct word equation for photosynthesis? A carbon dioxide + sugar → oxygen + water B carbon dioxide + water → oxygen + sugar C oxygen + sugar → carbon dioxide + water D oxygen + water → carbon dioxide + sugar

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2014

3 What is the correct word equation for photosynthesis? A carbon dioxide + sugar → oxygen + water B carbon dioxide + water → oxygen + sugar C oxygen + sugar → carbon dioxide + water D oxygen + water → carbon dioxide + sugar

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2014

5 The diagram shows a section through a cell from a leaf. Which part makes simple sugars using light? A B C D

1 marks

Answer: D

This question in 0654/11 May/June 2015

5 The diagram shows a section through a leaf. Where are carbohydrates made? B A C D

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2015

5 The diagram shows a section through a leaf. Where are carbohydrates made? B A C D

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2015

4 The diagram shows a section through a leaf. Where are carbohydrates made? B A C D

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2015

4 A plant is destarched and then one of its leaves is partly covered with black card as shown. black card The plant is then put in the light for six hours. The card is removed and the leaf is tested for starch using iodine solution. Which colours are seen five minutes after iodine solution is added? area of leaf not covered by card covered by card A blue / black blue / black B blue / black yellow C yellow blue / black D yellow yellow

1 marks

Answer: B

This question in 0654/13 May/June 2016

3 The photograph shows a leaf as seen under a microscope. Which part of the leaf produces oxygen in the light? A B C D

1 marks

Answer: C

This question in 0654/12 May/June 2017

2 What are the raw materials and products of photosynthesis? raw materials products A carbon dioxide + sugar oxygen + water B carbon dioxide + water oxygen + sugar C oxygen + sugar carbon dioxide + water D oxygen + water carbon dioxide + sugar

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2017

5 Four test-tubes were set up as shown in the diagram. Which test-tube will contain the most dissolved oxygen after 24 hours? A B C D water pond aquatic snail plant light light dark dark

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2018

5 The diagram shows a section through a leaf. P Q T R S Which structures contain chloroplasts? A P, Q and R B Q, R and S C R, S and T D S, T and P

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2018

5 Plants make sugars from water and carbon dioxide. From where do they get the carbon dioxide? A rain soaking into the leaves B the air C the soil through the roots D they make it in photosynthesis

1 marks

Answer: B

This question in 0654/12 May/June 2019

5 Plants make sugars from water and carbon dioxide. From where do they get the carbon dioxide? A rain soaking into the leaves B the air C the soil through the roots D they make it in photosynthesis

1 marks

Answer: B

This question in 0654/13 May/June 2019

5 What is the word equation for photosynthesis? 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: B

This question in 0654/11 Oct/Nov 2019

5 What is the word equation for photosynthesis? 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: B

This question in 0654/12 Oct/Nov 2019

5 What is the word equation for photosynthesis? 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: B

This question in 0654/13 Oct/Nov 2019

5 A farmer observes that his field of grass is not looking as green as it should be. Which substance is likely to be in short supply? A carbon dioxide in the air B magnesium in the soil C nitrogen in the air D water in the soil

1 marks

Answer: B

This question in 0654/11 May/June 2020

5 The diagram shows a variegated leaf. white area green area Which requirement for photosynthesis can be tested using this leaf but not a completely green leaf? A carbon dioxide B chlorophyll C light D water

1 marks

Answer: B

This question in 0654/12 May/June 2020

5 An investigation was carried out to show that carbon dioxide was necessary for photosynthesis to occur in a plant. Which conditions should the plant be kept in as a suitable control for this experiment? A clear container, with lots of carbon dioxide B clear container, without any carbon dioxide C black container, with lots of carbon dioxide D black container, without any carbon dioxide

1 marks

Answer: B

This question in 0654/13 May/June 2020

5 Which are the products of photosynthesis in a green plant? A carbon dioxide and water B glucose and carbon dioxide C oxygen and glucose D oxygen and water

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2020

5 Which conditions will result in the highest rate of photosynthesis? carbon dioxide light intensity concentration A high high B high low C low high D low low

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2020

5 Which chemical element is present in chlorophyll? A calcium B iron C magnesium D sodium

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2020

5 The rate of photosynthesis was measured by counting the number of bubbles of oxygen produced by a submerged aquatic plant at different light intensities as shown. water aquatic plant Which two variables need to be kept constant? A size of plant used and temperature of the water B light intensity and size of the boiling tube C size of plant used and size of the boiling tube D temperature of the water and light intensity

1 marks

Answer: A

This question in 0654/12 Feb/March 2021

5 Four test-tubes were set up as shown. Which test-tube will contain the most dissolved oxygen after 24 hours? A B C D water pond aquatic snail plant light light dark dark

1 marks

Answer: A

This question in 0654/11 May/June 2021

5 Four test-tubes were set up as shown. Which test-tube will contain the most dissolved oxygen after 24 hours? A B C D water pond aquatic snail plant light light dark dark

1 marks

Answer: A

This question in 0654/12 May/June 2021

13 Which process removes carbon dioxide from the atmosphere? A combustion B photosynthesis C respiration D transpiration

1 marks

Answer: B

This question in 0654/12 May/June 2021

5 Four test-tubes were set up as shown. Which test-tube will contain the most dissolved oxygen after 24 hours? A B C D water pond aquatic snail plant light light dark dark

1 marks

Answer: A

This question in 0654/13 May/June 2021

13 Which process removes carbon dioxide from the atmosphere? A combustion B photosynthesis C respiration D transpiration

1 marks

Answer: B

This question in 0654/13 May/June 2021

5 The diagram shows an experiment to investigate photosynthesis. When leaves photosynthesise, they store some carbohydrates as starch. Potassium hydroxide absorbs carbon dioxide. cotton wool with vaseline to seal leaf L the flask leaf M potassium hydroxide water After standing in sunlight for 10 hours, leaf L contained no starch but leaf M contained a lot of starch. What does this show? A A leaf cannot make starch in a sealed flask. B A leaf cannot make starch without carbon dioxide. C A leaf cannot make starch without light. D A leaf cannot make starch without oxygen.

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2021

5 The diagram shows an experiment to investigate photosynthesis. When leaves photosynthesise, they store some carbohydrates as starch. Potassium hydroxide absorbs carbon dioxide. cotton wool with vaseline to seal leaf L the flask leaf M potassium hydroxide water After standing in sunlight for 10 hours, leaf L contained no starch but leaf M contained a lot of starch. What does this show? A A leaf cannot make starch in a sealed flask. B A leaf cannot make starch without carbon dioxide. C A leaf cannot make starch without light. D A leaf cannot make starch without oxygen.

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2021

5 The diagram shows an experiment to investigate photosynthesis. When leaves photosynthesise, they store some carbohydrates as starch. Potassium hydroxide absorbs carbon dioxide. cotton wool with vaseline to seal leaf L the flask leaf M potassium hydroxide water After standing in sunlight for 10 hours, leaf L contained no starch but leaf M contained a lot of starch. What does this show? A A leaf cannot make starch in a sealed flask. B A leaf cannot make starch without carbon dioxide. C A leaf cannot make starch without light. D A leaf cannot make starch without oxygen.

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2021

12 A producer is an organism which makes its own organic nutrients. Which process does a producer use and what is the source of energy? process source of energy A photosynthesis dead organic matter B respiration sunlight C photosynthesis sunlight D respiration dead organic matter

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2021

5 Which ion is important for chlorophyll production in plants? A calcium B iron C magnesium D nitrate

1 marks

Answer: C

This question in 0654/12 Feb/March 2022

5 A student places a plant in the dark for 24 hours. Aluminium foil is then placed around one leaf. A second leaf is sealed in a bag with soda lime to remove carbon dioxide. A third leaf is then sealed in a bag with iron filings to remove oxygen. The plant is then left in the light for a further 24 hours. The diagram shows the experiment. Y aluminium foil wrapped around leaf X Z iron filings to soda lime to remove remove oxygen carbon dioxide Which leaves would turn blue-black when tested with iodine solution? A X only B X and Y C Y and Z D Z only

1 marks

Answer: A

This question in 0654/11 May/June 2022

5 The diagram shows an investigation into factors affecting photosynthesis. aluminium green green white green foil leaf leaf leaf leaf sodium hydroxide to remove carbon dioxide The tubes are left for 24 hours after which the leaves are tested with iodine solution. How many of these leaves turn blue-black when tested with iodine solution? A 1 B 2 C 3 D 4

1 marks

Answer: A

This question in 0654/12 May/June 2022

5 The diagram shows an investigation into factors affecting photosynthesis. aluminium green green white green foil leaf leaf leaf leaf sodium hydroxide to remove carbon dioxide The tubes are left for 24 hours after which the leaves are tested with iodine solution. How many of these leaves turn blue-black when tested with iodine solution? A 1 B 2 C 3 D 4

1 marks

Answer: A

This question in 0654/13 May/June 2022

5 Which row is correct for photosynthesis? raw materials products A carbon dioxide and glucose oxygen and water B carbon dioxide and water oxygen and glucose C oxygen and glucose carbon dioxide and water D oxygen and water carbon dioxide and glucose

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2022

5 A plant with variegated leaves is destarched. A strip of black paper is attached to both sides of a leaf and the plant is placed in the light for 24 hours. strip of black paper white green The leaf is then tested for starch. 2 key 1 1 green under paper 2 green in the light position of 3 3 white in the light black paper 4 white under paper 4 Which areas of the leaf stain blue-black with iodine? A 1 and 4 B 1 only C 2 and 3 D 2 only

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2022

5 Which two arrows represent photosynthesis? carbon dioxide in the air 1 2 plant 3 4 oxygen in the air A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: B

This question in 0654/11 May/June 2023

5 The diagram shows a leaf, still attached to a plant, with both green and white areas that have been partly covered with black paper. The leaf is left in bright light for six hours and then tested for starch. Which area of the leaf turns blue-black after the starch test? A B C green area white area D black paper

1 marks

Answer: B

This question in 0654/12 May/June 2023

5 The diagram shows a leaf, still attached to a plant, with both green and white areas that have been partly covered with black paper. The leaf is left in bright light for six hours and then tested for starch. Which area of the leaf turns blue-black after the starch test? A B C green area white area D black paper

1 marks

Answer: B

This question in 0654/13 May/June 2023

5 Which conditions will result in the highest rate of photosynthesis? carbon dioxide light intensity concentration A high high B high low C low high D low low

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2023

5 Plants require various ions to manufacture other molecules. Which row shows the molecules that plants make from magnesium ions and nitrate ions? magnesium ions nitrate ions A chlorophyll chlorophyll B chlorophyll protein C protein chlorophyll D protein protein

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2023

5 Which word is missing from the word equation for photosynthesis? carbon dioxide + …………………  glucose + oxygen A carbohydrate B chlorophyll C light D water

1 marks

Answer: D

This question in 0654/12 Feb/March 2024

5 The rate of photosynthesis of an aquatic plant is measured by counting the number of bubbles of oxygen produced every minute, as shown. The rate is measured at different light intensities. boiling tube water aquatic plant Which two variables need to be kept constant? A size of plant and temperature of the water B light intensity and size of the boiling tube C size of plant and size of the boiling tube D temperature of the water and light intensity

1 marks

Answer: A

This question in 0654/11 May/June 2024

5 What are the products of photosynthesis in a green plant? A carbon dioxide and water B glucose and carbon dioxide C oxygen and glucose D oxygen and water

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2024

5 What are the products of photosynthesis in a green plant? A carbon dioxide and water B glucose and carbon dioxide C oxygen and glucose D oxygen and water

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2024

3 Which leaf cell produces the most glucose? A palisade mesophyll B phloem C spongy mesophyll D xylem

1 marks

Answer: A

This question in 0654/12 Feb/March 2025

7 The diagram shows a variegated leaf. white area green area Which requirement for photosynthesis can be tested using this leaf but not using a completely green leaf? A carbon dioxide B chlorophyll C light D water

1 marks

Answer: B

This question in 0654/12 Feb/March 2025

6 The starch in a plant is removed. One part of a leaf of the plant is covered with black card. black card The plant is then put in the light for six hours. The card is removed and the leaf is tested for starch using iodine solution. Which row shows the colours of the iodine solution after it is added to different parts of the leaf? part of leaf not covered by card covered by card A blue-black blue-black B blue-black yellow C yellow blue-black D yellow yellow

1 marks

Answer: B

This question in 0654/11 May/June 2025

5 Which statement about photosynthesis is correct? A A plant uses carbon dioxide and glucose to produce oxygen and water. B A plant uses carbon dioxide and water to produce glucose and oxygen. C A plant uses glucose and oxygen to produce carbon dioxide and water. D A plant uses oxygen and water to produce glucose and carbon dioxide.

1 marks

Answer: B

This question in 0654/12 May/June 2025

5 Which statement about photosynthesis is correct? A A plant uses carbon dioxide and glucose to produce oxygen and water. B A plant uses carbon dioxide and water to produce glucose and oxygen. C A plant uses glucose and oxygen to produce carbon dioxide and water. D A plant uses oxygen and water to produce glucose and carbon dioxide.

1 marks

Answer: B

This question in 0654/13 May/June 2025

6 The diagram shows a section through a cell from a leaf. Which part makes glucose using light? B C A D

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2025