In a lab experiment with peroxide and yeast, the hydrogen peroxide (2H2O2 ) breaks down into water (2H2O liquid) and oxygen (O2 gas) in the presence of yeast. The yeast serves as a . Catalyst in the decomposition of the hydrogen peroxide

Substrate in the decomposition of the hydrogen peroxide

Active site between the hydrogen peroxide and water

Synthesis in the decomposition of hydrogen peroxide