plumiEnzymes: CAIE IGCSE Biology questions
Every CAIE IGCSE Biology exam question on 5.1 Enzymes, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
Find questions346
Calculations
Q2(a)
The whole paper ↗![June 2024 Paper 3, question 2(a): Describe what is meant by a catalyst. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-02-a-qp.webp)
Q2(b)
The whole paper ↗![June 2024 Paper 3, question 2(b): State the type of biological molecule enzymes are made of. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-02-b-qp.webp)
Q2(c)(i)
The whole paper ↗![June 2024 Paper 3, question 2(c)(i): Compare the effect of temperature on the rate of enzyme activity for enzymes A and B. Use data from Fig. 2.1 to support your answer. [4]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-02-ci-qp.webp)
Q2(c)(ii)
The whole paper ↗![June 2024 Paper 3, question 2(c)(ii): State the part of an enzyme that has a complementary shape to a substrate. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-02-cii-qp.webp)
Q2(c)(iii)
The whole paper ↗![June 2024 Paper 3, question 2(c)(iii): State one factor, other than temperature, that would affect the rate of enzyme activity. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-02-ciii-qp.webp)
Q2(d)
The whole paper ↗
Q4(a)(i)
The whole paper ↗![June 2024 Paper 4, question 4(a)(i): Explain the results for the three liquids shown in Table 4.1. [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061041-jun24-04-ai-qp.webp)
Q4(a)(ii)
The whole paper ↗
Q6(a)(i)
The whole paper ↗![Specimen Paper 3, question 6(a)(i): State the optimum temperature for the enzyme in Fig. 6.1. °C [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061003-spec-06-ai-qp.webp)
Q6(a)(ii)
The whole paper ↗![Specimen Paper 3, question 6(a)(ii): State why there is no enzyme activity at 60 °C. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061003-spec-06-aii-qp.webp)
Q6(b)
The whole paper ↗![Specimen Paper 3, question 6(b): State one factor other than temperature that affects enzyme activity. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061003-spec-06-b-qp.webp)
Q5(b)(ii)
The whole paper ↗![Specimen Paper 4, question 5(b)(ii): Explain why the shape of an enzyme is important for digestion. [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061004-spec-05-bii-qp.webp)
Q1(a)(i)
The whole paper ↗![Specimen Paper 6, question 1(a)(i): Prepare a table to record your results. Measure the height of the foam in each of the test-tubes in Fig. 1.1. Record these measurements in your table. [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061006-spec-01-ai-qp.webp)
Q1(a)(ii)
The whole paper ↗![Specimen Paper 6, question 1(a)(ii): Calculate the difference in the height of the foam produced by the cooked and uncooked potato after three minutes. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061006-spec-01-aii-qp.webp)
Q1(a)(iii)
The whole paper ↗![Specimen Paper 6, question 1(a)(iii): State one conclusion for these results. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061006-spec-01-aiii-qp.webp)
All 25 questions on Enzymes, as a list
- June 2024, Paper 1, Q11 (1 mark): What is a correct statement about enzymes? A The pH has no effect on the rate of reaction. B They are denatured at low temperatures. C They are made of carbohyd
- June 2024, Paper 1, Q12 (1 mark): Which statement about enzyme action is correct? A The shape of the enzyme’s active site is complementary to all proteins. B The shape of the enzyme’s active sit
- June 2024, Paper 3, Q2(a) (2 marks): Describe what is meant by a catalyst. [2]
- June 2024, Paper 3, Q2(b) (1 mark): State the type of biological molecule enzymes are made of. [1]
- June 2024, Paper 3, Q2(c)(i) (4 marks): Compare the effect of temperature on the rate of enzyme activity for enzymes A and B. Use data from Fig. 2.1 to support your answer. [4]
- June 2024, Paper 3, Q2(c)(ii) (1 mark): State the part of an enzyme that has a complementary shape to a substrate. [1]
- June 2024, Paper 3, Q2(c)(iii) (1 mark): State one factor, other than temperature, that would affect the rate of enzyme activity. [1]
- June 2024, Paper 3, Q2(d) (3 marks): The box on the left contains the word ‘Enzymes’. The boxes on the right contain some sentence endings. Draw three lines from the box on the left to make three c
- June 2024, Paper 4, Q4(a)(i) (3 marks): Explain the results for the three liquids shown in Table 4.1. [3]
- June 2024, Paper 4, Q4(a)(ii) (4 marks): The student kept the solutions at a temperature that was close to the optimum during the investigation. Using your knowledge of the effect of temperature on enz
- Specimen, Paper 1, Q10 (1 mark): The diagrams show a protease enzyme catalysing the breaking of part of a protein molecule into smaller pieces. Which diagram has three correct labels? A B produ
- Specimen, Paper 2, Q9 (1 mark): The diagrams show a protease enzyme catalysing the breaking of part of a protein molecule into smaller pieces. Which diagram has three correct labels? A B produ
- Specimen, Paper 2, Q10 (1 mark): A student wrote some notes about enzymes. She wrote: ‘The …1… of an enzyme is …2… to an area on the substrate. This area on the substrate can fit into it to for
- Specimen, Paper 3, Q6(a)(i) (1 mark): State the optimum temperature for the enzyme in Fig. 6.1. °C [1]
- Specimen, Paper 3, Q6(a)(ii) (1 mark): State why there is no enzyme activity at 60 °C. [1]
- Specimen, Paper 3, Q6(b) (1 mark): State one factor other than temperature that affects enzyme activity. [1]
- Specimen, Paper 4, Q5(b)(ii) (3 marks): Explain why the shape of an enzyme is important for digestion. [3]
- Specimen, Paper 6, Q1(a)(i) (3 marks): Prepare a table to record your results. Measure the height of the foam in each of the test-tubes in Fig. 1.1. Record these measurements in your table. [3]
- Specimen, Paper 6, Q1(a)(ii) (1 mark): Calculate the difference in the height of the foam produced by the cooked and uncooked potato after three minutes. [1]
- Specimen, Paper 6, Q1(a)(iii) (1 mark): State one conclusion for these results. [1]
- Specimen, Paper 6, Q1(b)(i) (1 mark): Identify the independent variable in this investigation. [1]
- Specimen, Paper 6, Q1(b)(ii) (1 mark): State why it is important that the two potato cylinders were identical in shape and size. [1]
- Specimen, Paper 6, Q1(b)(iii) (2 marks): State two other variables that were kept constant in this investigation. 1 2 [2]
- Specimen, Paper 6, Q1(c) (1 mark): Identify one possible source of error in the method used in this investigation. [1]
- Specimen, Paper 6, Q1(d) (6 marks): A student stated that: ‘Catalase activity is the same in all species of plants.’ Plan an investigation to test this statement. [6]
Questions, mark schemes and examiner’s reports are © Cambridge University Press & Assessment, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every CAIE IGCSE Biology paper.
Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.