2.11 Temperature and enzyme function
Exam question
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What happens to an enzyme at a temperature well above its optimum?
(1)Total for this question: 1 mark
2(c) BIOLOGICAL MOLECULES · EXAM QUESTIONS
2.11 Temperature and enzyme function
31 exam-style questions. 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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2.11 Temperature and enzyme function
Exam question
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Why does enzyme activity increase from 10 °C to 30 °C?
(1)Total for this question: 1 mark
2.11 Temperature and enzyme function
Exam question
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What is the optimum temperature of most human enzymes?
(1)Total for this question: 1 mark
2.11 Temperature and enzyme function
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Explain why enzyme activity is low at 5 °C.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
Exam question
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Explain why enzyme activity decreases above the optimum temperature.
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Total for this question: 3 marks
2.11 Temperature and enzyme function
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Describe the effect of increasing temperature on the rate of an enzyme-catalysed reaction.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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Explain the shape of a graph of enzyme activity against temperature.
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Total for this question: 4 marks
2.11 Temperature and enzyme function
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Suggest why enzymes from bacteria living in hot springs have a higher optimum temperature than human enzymes.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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Explain why denaturation is permanent but the effect of low temperature is not.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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Explain why a person with a very high fever may become ill.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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State the term used for the temperature at which an enzyme works fastest.
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Total for this question: 1 mark
2.11 Temperature and enzyme function
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Explain what is meant by an enzyme–substrate complex.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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Describe the lock-and-key model of enzyme action.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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Explain why boiling an enzyme solution stops it working even after it cools.
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Total for this question: 2 marks
2.11 Temperature and enzyme function
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Biological washing powders work best at 40 °C. Explain why washing at 90 °C would remove fewer stains.
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Total for this question: 3 marks