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Title: Hamlet
Words: 286
Each weekday, Marshall Brain and the HowStuffWorks Staff answer questions in the Question of the Day section of HowStuffWorks. The Question Archive lets you view hundreds of questions and answers. Click here to ask a question. Here is today's question!
Question
Why do apples and potatoes turn brown when you slice them? How do you keep them from turning brown?
Answer
If you have read the HSW article entitled How Cells Work, you know that all cells contain thousands of enzymes. These enzymes do all of the work necessary for the cell to live its life. According to this article, the actual mechanism that causes browning in apples and potatoes involves an enzyme called polyphenol oxidase, also known as tyrosinase:
the browning reaction results ...
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