19-02-2017
Biology

Answered

Gracie squeezed some grapes and kept the juice in a vessel for 5 days at room temperature. On the fifth day she found that the juice tasted sour and appeared frothy.

What caused this change?

Verified Answer :

gabcamp120 gabcamp120

19-02-2017

Sounds to me that Gracie discovered fermentation, acid is produced giving the sour taste and CO2 is produced too. Some grapes have yeast on them to start fermentation

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