Typical aerobic growth of Saccharomyces (brewer's yeast) in aqueous media was studied. An apparatus was constructed in which yeast could grow under controlled exposure to electromagnetic radiation (2.45 GHz). Two sets of experiments were conducted at comparable temperatures of the growth media. In one, the entire energy of the system was provided by microwaves, while the other was energized in a traditional thermal fashion. The growth of the yeast was monitored by UV-vis spectroscopy at 400nm, using dispersion mode. Multiple runs of the same experiments were averaged and the growth data for two modes of energization plotted along with error bars representing standard deviations. Surprisingly little difference was noted between thermally and microwave heated samples. This was observed even upon prolonged growth of saccharomyces lasting up to 12 hours. The unique low microwave exposure apparatus will be described and the entire experimental setup discussed.