DP Biology (first assessment 2025)

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Question 19M.1B.SL.TZ1.1c

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1B.SL.TZ1.1c
Level SL Paper 1B Time zone TZ1
Command term Suggest Question number c Adapted from N/A
c.
[Maximum mark: 1]
19M.1B.SL.TZ1.1c
(c)

Based on these experimental results, suggest one advantage of immobilizing lipase.

[1]

Markscheme

a. it increases the range of temperature/pH that give high activity ✔ 

b. allows for commercial use in detergents ✔

Examiners report

Most candidates saw that the enzymes could work at a higher temperature and a broader range of temperature and pH values and were therefore able to achieve 1 mark. Few students could connect this to the industrial uses for enzymes. This was one of many instances in the paper where students’ inability to use precise language affected their scores. Specifically, students should be reminded that terms like “affect” and “change” do not communicate differences in data as well as words like “increase” and “decrease.”

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