C. Used as indicator organisms in water and some foods. I just can't go with the flow anymore. I've been thinking about joining a biofilm. The minimum number of separable cells on the surface of or in semi-solid agar medium which gives rise to a visible colony of progeny on the order of tens of millions of cells in number. CFUs may consist of pairs, chains and clusters as well as single cells.
Examples are organic carbon and hydrogen.
Enzymes display a high degree of specificity with regard to both the substrate on which they act and the type of reaction they catalyze. Enzymes may also be introduced from outside the cell to cause biochemical reactions. EPS Generic term referring to polymers of varying chemical composition that are excreted outside the cell. Synonymous with exopolysaccharide , exocellular polymer , extracellular polymer , exopolymer . In biofilms, EPS may refer to the polymers that extend between cells, forming a matrix and anchoring the cells to each other and to the substratum.