DP Biology (first assessment 2025)
Question 21M.2.HL.TZ2.e
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.HL.TZ2.e |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Suggest | Question number | e | Adapted from | N/A |
e.
[Maximum mark: 1]
21M.2.HL.TZ2.e
Suggest a reason for the effect of a diet reduced in acetylcholine on the larval survival rate.
[1]
Markscheme
(larvae lacking acetylcholine/with reduced AcH cannot survive because) acetylcholine is a neurotransmitter taking message from one neuron to another in synapses of nervous tissues
OR
messages would not pass from one neuron to the other
OR
(larvae) unable to synthesise/produce AcH, so need it from their diet ✔
OWTTE.
Examiners report
In general, the data analysis question was well attempted by the majority of students.
At least half of the candidates did not know that acetylcholine is a neurotransmitter (section 6.5).
