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What are enzymes?
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| Submitted: Tue Jan 27 2004
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Background Research What are enzymes? Enzymes are biological catalysts. They speed up the chemical reactions which go on inside living things. Without them the reactions would be so slow that life would stop all together. Enzymes are extremely efficient at doing their job. Here is an example. Some of the chemical reactions which take place in our cells, for example in the liver, produce a by-product call hydrogen peroxide. Hydrogen peroxide is very poisonous so it must be got rid off quickly. Under the influence of an enzyme called catalase, the hydrogen peroxide is broken down into harmless water and oxygen. Catalse acts very quickly: one molecule of it can deal with six million molecules of hydrogen peroxide in one minute. Types of enzymes Enzymes are made inside cells. Once formed, the enzyme may leave the cell and do its job outside. Such enzymes are called extra cellular enzymes. They include the digestive enzymes...
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