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The large holes in Swiss cheese are due to carbon dioxide produced by:

AStreptococcus sp.
BPropionibacterium
CLactobacillus sp.
DSaccharomyces sp.
Answer & Solution
Correct answer: B. Propionibacterium
1. Cheese is one of the oldest microbial foods. 2. Propionibacterium sharmanii makes the gas. 3. Roquefort cheese is ripened by a fungus. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._
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