O-LevelBiologyEcology & Environment5090/11 · May/June 2011 · Q271 Mark

The diagram shows a fermenter used to produce penicillin. Why is air pumped into the fermenter?

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.

A✓ ✓

B✓ x

Cx ✓

Dx x

✓ Correct answer

A: ✓ ✓

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2011 Paper 1 Variant 1, question 27.

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