plumiImmobilised enzymes: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 6.2.1.5 Immobilised enzymes, 2016–2025, with mark schemes and examiner’s reports where available.
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Q18(a)
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All 10 questions on Immobilised enzymes, as a list
- June 2023, Paper 2, Q18(a) (1 mark): State one other method for immobilising enzymes. [1]
- June 2023, Paper 2, Q18(b) (2 marks): One advantage of using immobilised enzymes is that the enzyme can be reused many times. However, the process of immobilisation can reduce the activity of enzyme
- June 2023, Paper 2, Q18(c)(i) (1 mark): Suggest one reason why using immobilised yeast might be more expensive than using immobilised invertase. [1] 20 Investigations involving immobilised enzymes can
- June 2023, Paper 2, Q18(c)(ii) (6 marks): Immobilised enzymes are often used for industrial processes. Fig. 18.1 shows three methods for immobilising enzymes. Fig. 18.1 Adsorption Covalent bonding Entra
- June 2022, Paper 2, Q2 (1 mark): Many industrial processes use immobilised enzymes. Which of the options is not an advantage of using immobilised enzymes rather than free enzymes? A Enzymes can
- November 2020, Paper 2, Q17(a) (1 mark): State one method by which tannase could be immobilised. .. [1]
- November 2020, Paper 2, Q17(b)(i) (2 marks): Calculate how many times more active immobilised tannase is compared to free tannase at pH8.0. Give your answer to an appropriate number of significant figures.
- November 2020, Paper 2, Q17(b)(iv) (2 marks): values than free tannase. Suggest why immobilised tannase is more active at pH8 than free tannase. [2]
- November 2020, Paper 2, Q17(c)(i) (2 marks): Suggest two reasons why using immobilised enzymes in industrial processes could be cheaper than using free enzymes. 1 2 [2]
- November 2020, Paper 2, Q17(c)(ii) (1 mark): State one disadvantage of using immobilised enzymes in industrial processes. • [1]
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