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To investigate how concentration of the enzyme catalase in celery extract affects the rate of reaction with hydrogen peroxide
Member rating: No Rating | Words: 4102 | Submitted: Thu Jan 24 2008
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Aim: To investigate how concentration of the enzyme catalase in celery extract affects the rate of reaction with hydrogen peroxide Reaction: 2 H2O2 (aq) --> 2 H2O (l) + O2 (g) Scientific Knowledge: Enzymes are protein molecules which can be defined as biological catalysts. A catalyst is a molecule which speeds up a chemical reaction. Nearly every metabolic reaction which takes place within a living organism is catalysed by an enzyme. Catalase is present in all living cells. Enzymes are globular proteins and like all globular proteins, are coiled into a three-dimensional shape with hydrophilic side chains, ensuring solubility. Enzymes also contain an active site (usually a cleft or depression) to which a substrate molecule can bind to. The shape of the active site is complementary to the shape of the substrate molecule and each enzyme is substrate specific, meaning each type of enzyme will only act on only one type of substrate molecule. Like...
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