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Question 18M.1.SL.TZ1.29

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.SL.TZ1.29
Level SL Paper 1 Time zone TZ1
Command term Question number 29 Adapted from N/A
29.
[Maximum mark: 1]
18M.1.SL.TZ1.29

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

[1]

Markscheme

A

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