Question

Provide a possible explanation as to why this test identifies the presence of cytochrome c oxidase

Answer 1

An oxidase test depends on a reagent that will change hues when it is oxidized. The reagent utilized as a part of the test just responds to cytochrome c oxidase by acting set up of oxygen to get electrons from the cytochrome.

Answer 2

Answer : The possible explanation as to why this test identifies the presence of cytochrome c oxidase and not other oxidases (like E. coli)
is because an oxidase test mostly relies on a reagent that will allow to change colors only when it gets oxidized.

The reagent widely used in the test reacts specifically with cytochrome c oxidase by acting in place of oxygen to receive electrons from the cytochrome and
transfer of electrons takes place to $O_{2}$, which reduces it to water.