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Yeast grows best in a neutral to slightly acidic environment. The pH inside a yeast cell is held relatively constant at around 5.5 and as long as this can be maintained the external pH doesn't matter too much.

The ideal pH for fermentation is probably closer to 4.0. Not because of yeast's preferences but because bacterial growth is seriously inhibited at this pH.

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13y ago
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13y ago

Saccharomyces is a yeast and it isn't normally described in terms of it's pH. That said, yeast's cytoplasm is normally maintained at a pH between 5.5 and 5.75. Yeast prefers to live in a mildly acid environment and yeast growth produces a range of organic acids which lowers the pH of it's environment.

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14y ago

3-4

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Q: What is the pH of Saccharomyces cerevisiae?
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