Question

if cellular respiration makes more fuel for the cells why wouldn't bacteria use this method
?

Answer 1

Cellular respiration occurs in bacteria also. Cellular respiration is a mulistep process starting from breaking down of nutrients and ending with energy production in the cells in form of ATP. In Eukaryotic cells respiration takes place in mitochondria where as bacteria do not possess mitochondria. But as mitochondria is very similar to bacteria and are thought to have originated from bacteria so bacteria produce ATPs using similar pathway as mitochondria do. The difference is that they perform respiration with the oxidation machinery present in their plasma membrane which is analogous to the mitochondrial membrane of eukaryotic cells.