The sugar in molasses, sugarcane
or fruits such as grapes is converted to glucose and fructose, (both
of which have the formula C6H12O6), in the presence of an enzyme,
invertase Glucose and fructose undergo fermentation in the
presence of another enzyme, zymase, which is found in yeast In wine making, grapes are the source of sugars and yeast As
grapes ripen, the quantity of sugar increases and yeast grows on the
outer skin