When you cut into a piece of fruit, cells within the fruit are microscopically bruised and release an enzyme called polyphenol oxidases. This enzyme reacts with both the air and other enzymes in the fruit to cause that brown discoloration and, sometimes, off flavors.
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Answer:
When you cut into a piece of fruit, cells within the fruit are microscopically bruised and release an enzyme called polyphenol oxidases. This enzyme reacts with both the air and other enzymes in the fruit to cause that brown discoloration and, sometimes, off flavors.