18 exam-style questions · Biology only (B): not in Science (Double Award). Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
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Plan it with CORMMSS: Design an investigation (Logic Lab).
5.11B The nitrogen cycle
Exam question
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Describe the roles of bacteria in the nitrogen cycle.
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Total for this question: 5 marks
5.11B The nitrogen cycle
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Which bacteria convert nitrates into nitrogen gas?
(1)Total for this question: 1 mark
5.11B The nitrogen cycle
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Explain why plants need nitrates.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Explain why waterlogged soils are low in nitrates.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Explain why ploughing increases soil nitrates.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Explain why legumes such as peas grow well in nitrogen-poor soil.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Suggest why farmers plant clover and then plough it into the soil.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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State one way nitrogen gas is fixed other than by bacteria.
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Total for this question: 1 mark
5.11B The nitrogen cycle
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Identify the compounds formed by nitrifying bacteria, in order.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Explain why animals cannot use nitrogen gas directly.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Describe how nitrogen in a dead animal becomes available to a plant.
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Total for this question: 3 marks
5.11B The nitrogen cycle
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Explain the relationship between legumes and nitrogen-fixing bacteria.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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Suggest why draining a field improves crop growth.
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Total for this question: 2 marks
5.11B The nitrogen cycle
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State the substance in which nitrogen is stored in organisms.
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Total for this question: 1 mark
5.11B The nitrogen cycle
Exam question
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Illustrative data.
| Day | Nitrate / mg per kg |
|---|---|
| 0 | 12 |
| 5 | 18 |
| 10 | 29 |
| 15 | 38 |
| 20 | 41 |
Plot the nitrate concentration against time. Join your points with straight lines using a ruler.
(5)Graph skills: SLAPUK and choosing a scale
Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 5 marks
