I was just wondering, and it probably isn't a great, extreme complex question - But does alcohol contain a high or low enzyme reaction rate activity? I know that amylase is not a starch because it comes out negative for Iodine; I know that amylase is not a sugar because it tests negative for Benedicts; and I know that amylase is a protein because it tests positive for Biuret, but amylase contains starch and glycerol and since alochol fermentation has to have starch in it would that still give it a high reaction rate or low reaction rate even though it is a solvent? I'm not sure, so I could use some expertise in this biochemical field. And one more thing, what is the optimal pH level for enzyme catalysts? Thanks!