Which enzyme breaks down hydrogen peroxide to oxygen and water?

The enzyme that breaks down hydrogen peroxide into oxygen and water is called catalase.

Catalase is found in nearly all living organisms exposed to oxygen and is crucial for protecting cells from oxidative damage. Hydrogen peroxide (H₂O₂) is a byproduct of various metabolic processes and can be harmful at high levels. Catalase facilitates the decomposition of hydrogen peroxide by catalyzing the following reaction:

2 H₂O₂ → 2 H₂O + O₂

This reaction not only detoxifies hydrogen peroxide but also produces water and oxygen, which can be beneficial for the organism. Overall, catalase plays a vital role in maintaining cellular health by preventing potential damage from reactive oxygen species.