1 markAn experiment is set up with four test tubes as shown in the diagram below.Â
All four test tubes are left in sunlight for 6 hours.Â
Which test tube would contain the least amount of dissolved carbon dioxide after 6 hours?
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1 markThe glucose molecules formed during photosynthesis have which form of energy stored within them?
Light
Heat
Chemical
Mechanical
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1 markThe diagram below shows a palisade mesophyll cell found in the leaves of plants.
In which region of the cell would starch be stored?Â
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1 markName the product of photosynthesis that diffuses out of a green leaf through its stomata.
Water
Oxygen
Carbon dioxide
Glucose
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The diagrams show an experiment to find the rate of photosynthesis in an aquatic plant in different conditions.Â
Which plant produces the most bubbles per minute?
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1 markWhich of the following options is the best explanation for the role of chlorophyll in photosynthesis?
Chlorophyll...
transfers light energy from the Sun because it has magnesium ions
transfers chemical potential energy from sunlight into organic molecules which can be used to synthesise carbohydrates such as glucose
transfers light energy from the Sun into chemical energy in inorganic molecules which can be used for growth
transfers light energy into chemical potential energy in glucose molecules which are used in the synthesis of other carbohydrates
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1 markA student sets up an experiment to measure the rate of oxygen production of an aquatic plant when it is photosynthesising.
The student repeated the experiment several times to calculate the average amount of oxygen collected.
Which two factors should be kept constant during the student’s experiment?
The size of the funnel and beaker.
The size of the aquatic plant and time exposed to light.
The size of the aquatic plant and the amount of water in the beaker.
The size of the aquatic plant and the amount of gas in the measuring cylinder.
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1 markWhich of the following correctly identifies some of the molecules produced from the glucose synthesised by photosynthesis?
| Â | 1 | 2 | 3 |
| A | cellulose for storage | fats and oils for energy storage | starch to build cell walls |
| B | cellulose to build cell walls | fats and oils for energy storage | starch for storage |
| C | sucrose to be transported around the plant | fats and oils for energy storage | cellulose for storage |
| D | sucrose to be transported around the plant | starch to build cell walls | cellulose for storage |
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An investigation was carried out into the effects of light intensity and carbon dioxide concentration on the rate of photosynthesis.
Which graph shows the results of this investigation?
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1 markThe diagram below shows how the rate of photosynthesis is affected by different conditions.
What of the following correctly identifies the limiting factor for photosynthesis at the three points on the graph?
| Â | 1 | 2 | 3 |
| A | light intensity | light intensity | carbon dioxide concentration |
| B | temperature | temperature | light intensity |
| C | light intensity | temperature | carbon dioxide concentration |
| D | light intensity | carbon dioxide concentration | temperature |
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1 markTwo test tubes are set up with two similar leaves inside them, as shown in the diagram below.
One test tube is exposed to light, while the other is kept in the dark.
Â
The test tubes are left for 4 hours.
What colour will the hydrogencarbonate indicator solution be in each test tube?
| Â | dark | light |
| A | purple | yellow |
| B | colourless | yellow |
| C | purple | colourless |
| D | yellow | purple |
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1 markThe following could be used to write a balanced symbol equation for photosynthesis.
Which of the following show the correct balanced chemical equation for photosynthesis?
2 → 5 in the presence of 3
2 → 4 in the presence of 3
1 → 5 in the presence of 3
1 → 4 in the presence of 3
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1 markA student sets up a photosynthesis experiment.
A plant with striped leaves (similar to the one shown below) was kept in bright light for four hours.Â
A leaf was removed from the plant and treated with ethanol in hot water to remove chlorophyll before iodine was used to test for starch.
Which diagram shows the result of the test?
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