DP Biology (last assessment 2024)

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Question 21M.2.HL.TZ2.2d.i

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.2.HL.TZ2.2d.i
Level HL Paper 2 Time zone TZ2
Command term State Question number d.i Adapted from N/A
d.i.
[Maximum mark: 1]
21M.2.HL.TZ2.2d.i

Cholinergic synapses use acetylcholine as their neurotransmitter. They are widespread in the body, passing on signals to muscle cells. These synapses are affected by neonicotinoid pesticides.

The diagrams, which are not drawn to scale, show the synapse between two neurons and a detail of the synaptic cleft.

(d.i)

State the action of the enzyme acetylcholinesterase.

[1]

Markscheme

breaks down acetylcholine (to acetyl and choline) ✔

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