O-LevelBiologyEcology & Environment5090/12 · Oct/Nov 2014 · Q271 Mark

The diagram shows three stages in the production of a blue cheese. [Figure 27.1] The three stages use micro-organisms and enzymes, as shown by P, Q, R and S. P bacterial culture added, Q bacteria killed by pasteurisation, R rennin added, S fungal mould added. What is done at each of the stages?

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Astage 1 P and then Q, stage 2 R, stage 3 S

Bstage 1 P and then Q, stage 2 S, stage 3 R

Cstage 1 Q and then P, stage 2 R, stage 3 S

Dstage 1 Q and then P, stage 2 S, stage 3 R

✓ Correct answer

C: stage 1 Q and then P, stage 2 R, stage 3 S

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2014 Paper 1 Variant 2, question 27.

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