O-LevelBiologyEcology & Environment5090/11 · May/June 2018 · Q261 Mark

Penicillin is produced by the fungus Penicillium. The stages involved are listed. 1 Corn and yeast are added to the fungus. 2 Penicillin is extracted. 3 Penicillin is secreted by the fungus. 4 The product is filtered. What is the sequence of these stages?

A1→3→4→2

B2→3→1→4

C3→1→2→4

D4→3→1→2

✓ Correct answer

A: 1→3→4→2

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, May/June 2018 Paper 1 Variant 1, question 26.

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