| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.SL.TZ1.29 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 29 | Adapted from | N/A |
Question
Neural pathways in living brains can now be mapped by tracking the movement of water molecules inside axons. What keeps water molecules inside axons?
A. Plasma membrane
B. Hydrogen bonding
C. Pump proteins
D. Synapse
Markscheme
A
Examiners report
[N/A]
