given a range of pH from 48 which will be optimal for yeast

given a range of pH from 4-8 which will be optimal for yeast fermentation? explain why

Solution

Yeasts grow by digesting the sugars, which naturally occur in acidic medium. For example, the sugars in the fruits occur along with the citric acid. Thus, yeast cells have adopted to grow under acidic conditions, particularly at a pH of 4 to 4.5. Yeasts contain sucrose enzyme, which is modified to work best under acidic conditions, so when the pH is altered, the protein structure is also altered.

Thus, acidic conditions favour the yeast growth (4 to 4.5) because its metabolic enzymes are active at this pH.