plumiBiological molecules: CAIE IGCSE Biology questions
Every CAIE IGCSE Biology exam question on 4.1 Biological molecules, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Calculations
Q7(b)
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Q1(a)(i)
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Q1(a)(ii)
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Q1(b)(iii)
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Q3(b)(i)
The whole paper ↗![June 2024 Paper 6, question 3(b)(i): State the names of the reagents that can be used to test samples of plant tissue for starch and protein. starch protein [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-bi-qp.webp)
Q3(b)(ii)
The whole paper ↗![June 2024 Paper 6, question 3(b)(ii): Describe the method you would use to test a sample of plant tissue for fat. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061061-jun24-03-bii-qp.webp)
Q6(d)
The whole paper ↗![Specimen Paper 3, question 6(d): List the chemical elements present in fats. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061003-spec-06-d-qp.webp)
Q1(e)
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All 15 questions on Biological molecules, as a list
- June 2024, Paper 1, Q9 (1 mark): Large biological molecules are made of smaller molecules. Which row correctly matches the large molecule with the smaller molecules? large molecule smaller mole
- June 2024, Paper 1, Q10 (1 mark): A student tests a solution for protein. Which row shows the correct food test and a positive result? colour seen with a name of test positive result A Benedict’
- June 2024, Paper 2, Q7 (1 mark): The diagram shows the sticky end of the DNA of a plasmid that has been cut by a restriction enzyme. The unpaired bases are labelled. C A G T G What is the corre
- June 2024, Paper 2, Q8 (1 mark): A test was performed on a food substance. A positive result was shown by a colour change to blue-black. What solution was used for the test? A biuret solution B
- June 2024, Paper 3, Q7(b) (2 marks): The boxes on the left show some examples of nutrients. The boxes on the right show some examples of molecules. Draw lines to link each nutrient to a molecule fo
- June 2024, Paper 6, Q1(a)(i) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(a)(ii) (3 marks): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(b)(iii) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q3(b)(i) (2 marks): State the names of the reagents that can be used to test samples of plant tissue for starch and protein. starch protein [2]
- June 2024, Paper 6, Q3(b)(ii) (2 marks): Describe the method you would use to test a sample of plant tissue for fat. [2]
- Specimen, Paper 1, Q9 (1 mark): The data shows the concentrations of sugar and starch in an onion. total sugar including starch reducing sugar / g per 100 g / g per 100 g 3.7 0.0 The onion is
- Specimen, Paper 2, Q7 (1 mark): The data show the concentrations of sugar and starch in an onion. total sugar including starch reducing sugar / g per 100 g / g per 100 g 3.7 0.0 The onion is t
- Specimen, Paper 2, Q8 (1 mark): Which statement about the structure of DNA is correct? A Base A always pairs with base C. B Base A always pairs with base T. C DNA is made of protein. D DNA for
- Specimen, Paper 3, Q6(d) (1 mark): List the chemical elements present in fats. [1]
- Specimen, Paper 6, Q1(e) (5 marks): Potatoes contain starch. Starch can be broken down into reducing sugars. Describe the tests to identify starch and reducing sugars and give the results of the p
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