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O-LevelBiologyRespiration5090/11 · Oct/Nov 2019 · Q261 Mark

During cheese-making the pH of milk falls and this causes milk proteins to coagulate. What is the main cause of the lower pH?

Aaerobic respiration by bacteria
Baerobic respiration by yeast
Canaerobic respiration by bacteria
Danaerobic respiration by yeast

✓ Correct answer

C: anaerobic respiration by bacteria

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About this question

Topic
Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2019 Paper 1 Variant 1, question 26.

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