Both aerobic and anaerobic respiration occurs in bacteria.
In aerobic respiration, respiration occurs in the presence of oxygen and a complete breakdown of glucose takes place in this respiration. It is of following types;
There must be the presence of oxygen for obligate aerobic respiration. They die in the absence of oxygen. Eg; Bacillus subliles
In facultative aerobic bacteria, respiration normally takes place by anaerobically but when there is a presence of oxygen they can change into aerobes. Eg; Rhodopseudomonas
In anaerobic respiration, respiration occurs in the absence of oxygen and incomplete breakdown of glucose takes place in this process.
In obligate anaerobic bacteria, respiration occurs anaerobically and they die in the presence of oxygen. Eg; Clostridium botulinum
In facultative anaerobic bacteria, respiration normally takes place by anaerobically but they can change into anaerobes in the absence of oxygen. Eg; Halophiles