Subject: What order are fructose, glucose and sucrose fermented in terms of speed?

I performed an experiment in which I tested fermentation rate using a 
gaspressuresensor over a period of 15 minutes with fructose, glucose and 
sucrose and baker's yeast. The result was that fructose produced most sugar 
and fastest, then glucose at a slower rate, then sucrose, for which virtually 
no CO2 was produced. I have no idea why this happened, and why fructose 
reacted faster than glucose? Does it have to do with the yeast taking a very 
very long time to break sucrose's glycosidic linkage? (ps. the ph was 
maintained at 7 throughout the experiment, and temperature at 37C. 
Thanks so much!! 

Re: What order are fructose, glucose and sucrose fermented in terms of speed?