Re: Why do aerobic organisms require catalase?

Aeorbic organisms require catalase because the oxygen atmosphere that we breathe is full of toxic forms of oxygen. Di-oxygen, or O2 is only one form of oxygen. Other forms include superoxide, hydroxides, hydroxyls, and peroxides. These forms of oxygen are toxic to cells (membranes, DNA, proteins, etc.). Catalase, as well as other enzymes, such as superoxide dismutase, and peroxidase help us defeat the toxic forms of oxygen so that they do not damage our cells. I hope this helps.

Best wishes,
Dr. Rik Obiso