In cells, hydrogen peroxide (H2O2) is converted to water (H2O) and oxygen (O2) through the activity of an enzyme called catalase. Catalase is found in the peroxisomes of cells and plays a crucial role in protecting cells from the harmful effects of hydrogen peroxide.

Hydrogen peroxide is a reactive oxygen species (ROS) that can cause oxidative stress and damage to cellular components such as proteins, lipids, and DNA. Catalase helps to detoxify hydrogen peroxide by converting it into water and oxygen, which are harmless to the cell.

The reaction catalyzed by catalase can be represented as follows:

2 H2O2 → 2 H2O + O2

Catalase is a highly efficient enzyme, and it can rapidly convert large amounts of hydrogen peroxide into water and oxygen. This is essential for maintaining the cellular redox balance and protecting cells from oxidative damage.