2.13 pH and enzyme function
Exam question
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What happens to an enzyme at a pH far from its optimum?
(1)Total for this question: 1 mark
2(c) BIOLOGICAL MOLECULES · EXAM QUESTIONS
2.13 pH and enzyme function
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2.13 pH and enzyme function
Exam question
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Which enzyme works best in acid conditions?
(1)Total for this question: 1 mark
2.13 pH and enzyme function
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Explain why an enzyme stops working at a very low pH.
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Total for this question: 3 marks
2.13 pH and enzyme function
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Explain why the protease in the stomach has a different optimum pH from the protease in the small intestine.
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Total for this question: 2 marks
2.13 pH and enzyme function
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Describe the effect of pH on enzyme activity.
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Total for this question: 2 marks
2.13 pH and enzyme function
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State the optimum pH of most enzymes in the human mouth.
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Total for this question: 1 mark
2.13 pH and enzyme function
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Explain why bile is important for enzymes in the small intestine.
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Total for this question: 2 marks
2.13 pH and enzyme function
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Suggest why salivary amylase stops digesting starch when food reaches the stomach.
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Total for this question: 2 marks
2.13 pH and enzyme function
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Explain why a change of pH changes the shape of an enzyme.
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Total for this question: 3 marks
2.13 pH and enzyme function
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Give the substance that makes the stomach acidic.
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Total for this question: 1 mark
2.13 pH and enzyme function
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Compare the effects of high temperature and extreme pH on an enzyme.
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Total for this question: 2 marks
2.13 pH and enzyme function
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Explain why some biological washing powders contain enzymes with high optimum pH.
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Total for this question: 2 marks
2.13 pH and enzyme function
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Enzyme activity at different pH pH Relative activity 2 0 4 15 6 60 8 100 10 45 12 0 Illustrative data, not from a real investigation. The table shows the activity of an enzyme at different pH values. Identify the optimum pH and the pH at which the enzyme was most likely denatured.
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Total for this question: 2 marks
2.13 pH and enzyme function
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Enzyme activity at different pH pH Relative activity 4 15 6 60 8 100 10 45 Illustrative data, not from a real investigation. Explain why the enzyme in the table showed some activity at pH 6 but less than at pH 8.
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Total for this question: 2 marks