Why is the imvic useful in identifying enterobacteriaceae? are further biochemical tests necessary for complete identification?

IMViC is very important in identifying Enterobacteriaceae especially when it is with urease. They incorporate Voges-Proskauer test, citrate production test, indole production test and methyl red test where it enables to identify the gram negative Enterobacteriaceae. It is not necessary to further do tests. However, you can do tests like urease, ONPG and oxidase.

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Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.