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Why does the acidity or alkalinity of a culture medium matter for cell growth?
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tissue culture
Tissue culture often requires sterile working conditions and thus is typically performed in a laminar flow cabinet (or tissue culture hood), which circulates filtered air to reduce the risk of culture contamination.
In the context of biology, the acidity or alkalinity of a culture mediumāmeasured by its pHāis critical because many essential molecular processes within cells occur only within a very narrow pH range.1
Maintaining a stable pH is vital for proper cellular function and homeostasis. Because most tissues naturally exist within one pH unit of neutral (pH 7), significant deviations toward acidity or alkalinity can disrupt these delicate internal processes, often rendering the environment unsuitable for cell survival or growth. Consequently, in tissue culture, regulating the medium's pH is a fundamental requirement to ensure that cells can function, divide, and thrive as they would within a living organism.1