Investigate A Factor Which Affects the Rate Of Fermentation Of Yeast This experiment is investigating one of the factors which affects the rate of fermentation of yeast. Several factors affect the rate of reaction:  Increasing the concentration. (See the lock and key theory.) If the substrate (glucose) is increased, then there would be more keys for the locks, therefore an increase in reactant concentration leads to an increase in reaction rate.  The surface area, the …showed first 75 words of 2445 total…

…showed last 75 words of 2445 total…ter the enzyme has become denatured, the temperature still increases, but the reaction rate decreases, eventually to nothing. To extend my investigation, I could investigate the other factors affecting the rate of fermentation of yeast. I could also use another substrate and see what occurs. There is a pattern in my results, as I have earlier explained, but it only occurs over the range of values that I have used, because the enzymes become denatured.