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Why do apples turn brown?
asked Aug 11, 2010 by triuser (1,768 points)

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Apples and other produce (e.g., pears, bananas, peaches, potatoes) contain an enzyme (called polyphenol oxidase or tyrosinase) that reacts with oxygen and iron-containing phenols that are also found in the apple. The oxidation reaction basically forms a sort of rust on the surface of the fruit. You see the browning when the fruit is cut or bruised because these actions damage the cells in the fruit, allowing oxygen in the air to react with the enzyme and other chemicals.
answered Aug 11, 2010 by trianswer (22,754 points)
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Because apples a sweet fruit. maximum sweet fruit is brown. Its a system natural. main cause apples brown because its create the god brown color. understand.
answered Aug 11, 2010 by trianswer (22,754 points)