O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2012 · Q271 Mark

The diagram shows a fermenter used for the production of antibiotics. Where do air and nutrients enter, and where do antibiotics and waste leave?

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.

AW, X, Y, Z

BY, Z, W, X

CY, X, W, Z

DW, Z, Y, X

✓ Correct answer

B: Y, Z, W, X

Oracle Prep sorts past-paper questions by topic, so you can drill Ecology & Environment and see which topics are most likely to come up next.

Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2012 Paper 1 Variant 1, question 27.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content