O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2023 · Q361 Mark

The antibiotic penicillin is produced by a fungus called Penicillium. The graph shows the changes in the masses of Penicillium fungus, penicillin and sugar in a fermenter during the production of a batch of antibiotic. What is represented by each curve on the graph?

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AX: penicillin, Y: Penicillium fungus, Z: sugar

BX: Penicillium fungus, Y: penicillin, Z: sugar

CX: sugar, Y: penicillin, Z: Penicillium fungus

DX: sugar, Y: Penicillium fungus, Z: penicillin

✓ Correct answer

C: X: sugar, Y: penicillin, Z: Penicillium fungus

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

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