| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.HL.TZ1.29 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 29 | Adapted from | N/A |
Question
Isoleucine will inhibit the reaction pathway shown below when the concentration of isoleucine exceeds the cell requirements.
Which enzyme does isoleucine inhibit?
A. Enzyme E1
B. Enzyme E2
C. Enzyme E3
D. Enzyme E5
Markscheme
A
Examiners report
[N/A]
