Yeast cells, Saccharomyces cerevisiae, were incubated with and without glucose at three different temperatures for a period of four minutes, during which the rate of $CO_2$ production was measured with a $CO_2$ sensor.

Yeast cells, Saccharomyces cerevisiae, were incubated with and without glucose at three different temperatures for a period of four minutes, during which the rate of $CO_2$ production was measured with a $CO_2$ sensor.

What conclusion can be drawn from the results of this experiment?