plumiBiotechnology: CAIE IGCSE Biology questions
Every CAIE IGCSE Biology exam question on 21.2 Biotechnology, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Q1(a)(i)
The whole paper ↗![June 2024 Paper 3, question 1(a)(i): State the name of the gas that caused bread dough B to increase in volume. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-01-ai-qp.webp)
Q1(a)(ii)
The whole paper ↗![June 2024 Paper 3, question 1(a)(ii): State the name of the process in yeast that produces the gas during bread‑making. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-01-aii-qp.webp)
Q1(b)
The whole paper ↗![June 2024 Paper 3, question 1(b): State one other product that is made using yeast, apart from food or drink. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-01-b-qp.webp)
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)
Q3(c)(i)
The whole paper ↗![June 2024 Paper 6, question 3(c)(i): State the dependent variable in the investigation described in 3(c). [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-ci-qp.webp)
Q3(c)(ii)
The whole paper ↗![June 2024 Paper 6, question 3(c)(ii): State two variables that were kept constant in this investigation. 1 2 [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-cii-qp.webp)
Q3(c)(iii)
The whole paper ↗![June 2024 Paper 6, question 3(c)(iii): Identify a hazard in the method described in 3(c) and suggest a safety precaution to reduce the hazard. hazard precaution [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-ciii-qp.webp)
Q3(c)(iv)
The whole paper ↗![June 2024 Paper 6, question 3(c)(iv): The student did not repeat the investigation and only collected one set of results. Explain why it is better to collect several sets of results. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-civ-qp.webp)
Q3(c)(v)
The whole paper ↗
Q3(d)(i)
The whole paper ↗
Q3(d)(ii)
The whole paper ↗![June 2024 Paper 6, question 3(d)(ii): Plot a line graph on the grid of the data in Table 3.1. [4]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-dii-qp.webp)
Q3(d)(iii)
The whole paper ↗![June 2024 Paper 6, question 3(d)(iii): Describe the relationship between the volume of liquid collected from the chopped apple and the concentration of pectinase solution. [2] [Total: 26]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-diii-qp.webp)
Q4(b)
The whole paper ↗
All 15 questions on Biotechnology, as a list
- June 2024, Paper 1, Q34 (1 mark): What is a use of yeast in biotechnology? A aerobic respiration to make biofuels B anaerobic respiration to make bread C aerobic respiration to make alcohol D an
- June 2024, Paper 3, Q1(a)(i) (1 mark): State the name of the gas that caused bread dough B to increase in volume. [1]
- June 2024, Paper 3, Q1(a)(ii) (1 mark): State the name of the process in yeast that produces the gas during bread‑making. [1]
- June 2024, Paper 3, Q1(b) (1 mark): State one other product that is made using yeast, apart from food or drink. [1]
- 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 6, Q3(c)(i) (1 mark): State the dependent variable in the investigation described in 3(c). [1]
- June 2024, Paper 6, Q3(c)(ii) (2 marks): State two variables that were kept constant in this investigation. 1 2 [2]
- June 2024, Paper 6, Q3(c)(iii) (2 marks): Identify a hazard in the method described in 3(c) and suggest a safety precaution to reduce the hazard. hazard precaution [2]
- June 2024, Paper 6, Q3(c)(iv) (1 mark): The student did not repeat the investigation and only collected one set of results. Explain why it is better to collect several sets of results. [1]
- June 2024, Paper 6, Q3(c)(v) (1 mark): The seventh beaker of chopped apple did not contain the pectinase solution. State what should have been added to this beaker to make it a control experiment. [1
- June 2024, Paper 6, Q3(d)(i) (2 marks): A sample of 150 g of chopped apple was placed in a beaker with the 0.8% pectinase solution. Using the information in Table 3.1, calculate the volume of liquid c
- June 2024, Paper 6, Q3(d)(ii) (4 marks): Plot a line graph on the grid of the data in Table 3.1. [4]
- June 2024, Paper 6, Q3(d)(iii) (2 marks): Describe the relationship between the volume of liquid collected from the chopped apple and the concentration of pectinase solution. [2] [Total: 26]
- Specimen, Paper 2, Q40 (1 mark): The diagram shows an industrial fermenter that is used to produce penicillin. X What is a function of the part labelled X? A add oxygen to the solution B mainta
- Specimen, Paper 4, Q4(b) (3 marks): When yeast respires anaerobically, ethanol is produced. Ethanol is a type of sustainable resource that can be made from a wide range of crop plants. It can be u
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