Draft

This experiment showed the ability of S. cerevisiae to ferment three different sugars, lactose, glucose, and sucrose. It was expected that this bacterium would only be able to ferment glucose and sucrose, but my observations revealed that it was able to ferment all three sugars. CO2 gas was observed in all three Durham tubes, and the media in all three tubes changed color from purple to yellow. This clearly showed that S. cerevisiae is able to ferment a variety of sugars, even one that is not present in its natural environment.