DP Biology (first assessment 2025)

Test builder »

Question 21M.2.SL.TZ2.c

Select a Test
Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.SL.TZ2.c
Level SL Paper 2 Time zone TZ2
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 2]
21M.2.SL.TZ2.c

Explain how acetylcholine initiates an action potential in a postsynaptic membrane.

[2]

Markscheme

a. acetylcholine binds to the receptor protein ✔

b. (causing a) change in tertiary structure / conformation of protein ✔

c. diffusion/entry of ions / Na+ through the receptor/channel protein allowed ✔

Syllabus sections