Again, the diversity of respiring microbes is vast, but they do have many things in common. ATP is generated by ETLP involving a membrane system. The terminal electron accepter is inorganic. For aerobic respiration this is oxygen, but bacteria are also capable of using nitrate, sulfate, methane and others. Substrates for respiration include Organic molecules - Sugars, amino acids, nucleotides, organic acids, fats.
Some microbes can even catabolize benzene or toluene.
The point is, the list is large. Inorganic - Certain groups of bacteria are capable of using an inorganic compound as their source of electrons. Products of Respiration tend to be highly oxidized. We will again concentrate first on the degradation of glucose because it is a very common and well understood pathway. The initial steps used by aerobic organisms to break down glucose are identical to that used by many fermentative microbes.