| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.SL.TZ1.30 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 30 | Adapted from | N/A |
Question
What hormone controls the metabolic rate of body cells?
A. Insulin
B. Leptin
C. Melatonin
D. Thyroxin
Markscheme
D
Examiners report
[N/A]
