Question 19M.3.HL.TZ1.1a
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.HL.TZ1.1a |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | a | Adapted from | N/A |
Lipase was extracted from the fungus Aspergillus niger and used to hydrolyse one of its substrates. This was repeated for an immobilized form of lipase. The graph shows how the enzyme activity varied at different pH and temperature levels.
[Source: adapted from Zdarta, J.; Klapiszewski, Ł.; Wysokowski, M.; Norman, M.; Kołodziejczak-Radzimska, A.; Moszyński, D.;
Ehrlich, H.; Maciejewski, H.; Stelling, A.L.; Jesionowski, T. Chitin-Lignin Material as a Novel Matrix for Enzyme Immobilization.
Mar. Drugs 2015, 13, 2424–2446.]
State the effect immobilization of lipase has on its optimum temperature.
[1]
it is increased ✔
This question was handled well by most students, who were able to see that immobilization increased the optimum temperature. Some candidates did miss the mark by only stating numerical values or commenting on the range of temperatures used, and therefore not the optimum temperature.
