Question

Big holes in Swiss cheese are made by a:

• A. a machine
• B. a bacterium that produces methane gas
• C. a bacterium producing a large amount of carbon dioxide
• D. a fungus that releases a lot of gases during its metabolic activities.

Answer 1

Answer: (C)

a bacterium producing a large amount of carbon dioxide

Propionibacterium shermani releases carbon dioxide and forms bubbles when it consumes lactic acid. The bubbles form Big holes in the Swiss cheese.
So, the correct option is 'a bacterium producing a large amount of carbon dioxide'