Every scientist says that microbes release acids or bases for increasing or decreasing pH. Until now, any other mechanism discovered or not?
Hello, pH is the concentration of hydrogen ions in the solution. So any metabolic pathway which can act on hydrogen ion concentration can have an influence on pH. Bacteria can change their environment and react to it, we were able to understand a variety of interactions within populations as well as interactions between different species. Although the interaction outcomes were quite different, they were all mediated by a single environmental parameter -the pH which shows that even a rather complex set of interactions can be mediated through the same environmental parameter.
See the link below, may be useful for you.
Article Modifying and reacting to the environmental pH can drive bac...
Are they have any direct or indirect relationship with bonding (hydrogen or covalent bond)? if yes or no then justify?
Yes, there were direct and indirect ways.
For example, direct way is Hydrogen oxidizing bacteria are a group of facultative autotrophs that can use hydrogen as an electron donor.
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