DP Biology (first assessment 2025)

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Question 19M.2.SL.TZ2.1e

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ2.1e
Level SL Paper 2 Time zone TZ2
Command term Compare and contrast Question number e Adapted from N/A
e.
[Maximum mark: 2]
19M.2.SL.TZ2.1e
(e)

Compare and contrast the effects of the mouse alarm compound and stoat scent on the G1 neurons.

[2]

Markscheme

a. both chemicals cause action potentials
OR
both chemicals respond in the majority of/five/most neurons ✔

b. stoat scent causes a higher action potential/longer/bigger response than mouse alarm compound «in each neuron»
OR
neuron 2 reacts strongly to the stoat scent but has a minimal/no response to the mouse alarm compound ✔

Examiners report

Answers to e were encouraging as most were able to give both the similarity and the difference.

Syllabus sections