DP Biology (first assessment 2025)

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Question 19M.1B.SL.TZ1.2a.ii

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1B.SL.TZ1.2a.ii
Level SL Paper 1B Time zone TZ1
Command term Suggest Question number a.ii Adapted from N/A
a.ii.
[Maximum mark: 1]
19M.1B.SL.TZ1.2a.ii
(a.ii)

Suggest one conclusion that can be drawn from the results shown in the graph.

[1]

Markscheme

a. as fungus grows, the rate of oxygen consumption increases ✔

b. around day 4/5 fungus begins to grow/no growth in days 1–3 ✔ 

c. the rate of fungus growth/rate of respiration is highest after 5 days ✔

Examiners report

Many candidates described what was shown by the graph rather than making a conclusion related to the growth of fungi. Thus “oxygen consumption increased after day 4” or references to the feed respiring were common answers.

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