DP Biology (first assessment 2025)

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Question 22N.1A.HL.TZ0.24

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1A.HL.TZ0.24
Level HL Paper 1A Time zone TZ0
Command term Question number 24 Adapted from N/A
24.
[Maximum mark: 1]
22N.1A.HL.TZ0.24

Atropine drops are used by opticians to dilate the pupil, so that a thorough examination of the retina can be performed. Atropine binds to acetylcholine receptors in synapses.

 

What is the effect of atropine binding in synapses?

A.  Inhibits the binding of acetylcholine at the presynaptic membrane

B.  Inhibits the release of acetylcholine from the presynaptic neuron

C.  Prevents binding of acetylcholine at the postsynaptic membrane

D.  Prevents transport of acetylcholine through the postsynaptic membrane

[1]

Markscheme

C

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