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Your body relies on enzymes. You might be familiar with the enzymes that digest your food, like the salivary amylase in your saliva, but enzymes do all kinds of jobs everywhere in your body. Enzymes are special types of catalysts made of protein. Catalysts help speed up chemical reactions without being used up themselves.
Enzymes are not just found in the human body, they are found in all living things, including yeast. Yeast contains the enzyme catalase (note how the name of many enzymes ends in “–ase”). Catalase breaks down the chemical hydrogen peroxide (H202) into oxygen gas and water. It is easy to see if catalase is working because as it creates oxygen gas, causing bubbles to form.
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