O-LevelBiologyRespiration5090/11 · Oct/Nov 2018 · Q271 Mark

The graph shows how the rate of penicillin production from the fungus Penicillium varies with temperature at two different oxygen concentrations. [Figure showing a graph of rate of penicillin production vs. temperature for high and low oxygen concentrations] What can be deduced from the graph? 1 The fungus Penicillium respires aerobically. 2 The fungus Penicillium respires anaerobically. 3 The optimum temperature for penicillin production is approximately 24 °C.

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A1, 2 and 3

B1 and 2 only

C1 and 3 only

D2 and 3 only

✓ Correct answer

C: 1 and 3 only

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2018 Paper 1 Variant 1, question 27.

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