O-LevelBiologyRespiration5090/11 · Oct/Nov 2020 · Q171 Mark

The diagram shows apparatus used to investigate respiration. [Figure 17.1] Which change will be seen and what is the explanation?

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Aoil drop moves left oxygen is used up by the peas

Boil drop does not move oxygen is used up as fast as carbon dioxide is released

Coil drop does not move carbon dioxide is absorbed

Doil drop moves right peas release carbon dioxide

✓ Correct answer

A: oil drop moves left oxygen is used up by the peas

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2020 Paper 1 Variant 1, question 17.

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