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?

lactic acid fermentation of the grape juice by anaerobic bacteria

alcohol fermentation of the grape juice by anaerobic bacteria

alcoholic fermentation of the grape juice by aerobic bacteria

Question

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?



lactic acid fermentation of the grape juice by anaerobic bacteria



alcohol fermentation of the grape juice by anaerobic bacteria



alcoholic fermentation of the grape juice by aerobic bacteria

readergirl12 · Answer

What do you think it is?  :P

readergirl12 · Answer

Well.. Do you know the difference anaerobic bacteria and  aerobic bacteria?

readergirl12 · Answer

Aerobic means "with oxygen," and anaerobic means "without oxygen." Anaerobic exercise is the type where you get out of breath in just a few moments, like when you lift weights for improving strength, when you sprint, or when you climb a long flight of stairs.  Source:Google

readergirl12 · Answer

And this xD : http://www.differencebetween.net/science/difference-between-aerobic-and-anaerobic-bacteria/