O-LevelBiologyRespiration5090/12 · Oct/Nov 2023 · Q361 Mark

Three flasks were set up as shown at 35 °C. Each flask had a balloon attached to the top. [Figure 36.1] The amount of inflation of each balloon was recorded after one hour. What is the correct order for the balloons from most to least inflated?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A1 → 3 → 2

B1 → 2 → 3

C3 → 1 → 2

D3 → 2 → 1

✓ Correct answer

A: 1 → 3 → 2

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2023 Paper 1 Variant 2, question 36.

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