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Why does 'Swiss cheese' have big holes?...

Why does 'Swiss cheese' have big holes?

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### Step-by-Step Solution: 1. **Identify the Bacteria Involved**: The primary bacteria responsible for the formation of Swiss cheese is *Propionibacterium shermani*. 2. **Understand the Fermentation Process**: During the fermentation process, *Propionibacterium shermani* consumes lactic acid. This lactic acid is a byproduct of the initial fermentation of milk by other bacteria. 3. **Gas Production**: As *Propionibacterium shermani* metabolizes the lactic acid, it produces carbon dioxide gas (CO2). ...
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