How does sugar concentration affect the fermentation of ethanol?

Answer:
Using wine to illustrate, the amount of sugar available to the yeast determines how much ethanol will be produced - up to 'a point', say a 13% ethanol solution: a concentration higher than this cannot be obtained [without distillation technology] because Yeast cannot tolerate it.
First answer by Betaclamp. Last edit by Betaclamp. Contributor trust: 104 [recommend contributor recommended]. Question popularity: 1 [recommend question].