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Question
Give examples to prove that microbes release gases during metabolism.
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Solution
There are numerous examples indicating that microorganisms emit gases during their metabolism. Examples are as follows:
- Bacteria ferment the dough required to make dosa and idlis. The puffy appearance of dough is related to the generation of CO2 during the fermentation process.
- Swiss cheese is distinguished by its characteristic flavour and large holes. The large holes are caused by the amount of CO2 produced by the bacterium Propionibacterium shermanii.
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The bacterium Bacillus thuringiensis serovar israelensis (Bti) is commercially prepared in various formulations such as liquid, water dispersible granules, powders, and pellets. It is used as a larvicide all over the world due to its ability to produce a toxic protein that primarily targets the larvae of mosquitoes. In Sweden, Bti has been applied on a large scale in the form of commercially available granular formulation Vecto Bac G (Valent BioScience, USA). The applications have taken place in the lower Dalalven River Area to control mass outbreaks of the floodplain mosquito Aedes sticticus. |
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Choose the correct answer from the options given below:
