Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein).There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein.These enzymes are considered ______.

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Exoenzymes are enzymes that are secreted by the bacterium and act outside of the cell to break down larger molecules like casein. Apoenzymes are incomplete enzymes that require a cofactor to be activated. Ribozymes are RNA molecules that act as enzymes. Endoenzymes act within the cell to break down molecules.

Your Bacterium Is Growing on a Type of Medium Called