Where have bacteria been located?
All over the place. There are more bacteria in your body than there are human cells. They have also been found deep, deep underwater as well as in thermal hot springs, and areas of high salt concentrations.
Incorrect: Some bacteria do not have an electron transport chain and just glycolysis. If they do have an electron transport chain, then it would take place in the mitochondria. User response: Actually bacteria do not have a mitochondrium. Their electron transport chain is located inside their cytoplasmic membrane.