Most microorganism function at their best within a pH range

Most of the microorganisms function at their best within the neutral pH range i.e. of 6.0 - 7.5. The pH is important for the proper functioning of organisms as the enzymes that catalyze the chemical reactions of life require a specific pH to function. Moreover, the increase and decrease in pH can cause denaturation of biochemical like proteins and make them non-functional, resulting in cell death.