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Home Q & A Board Biology-Related Homework Help Biochemistry
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bzzy89 bzzy89
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10 years ago
What is the name of the brown stuff on sliced apples, and what purpose does it serve?
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#1
10 years ago
im not sure what its called. and theres no purpose.. its just when the air has been in contact with it for a while. nothing bad
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#2
10 years ago
Fresh cut apples turn brown when iron-containing chemicals inside apple cells react with oxygen in the air.  We see this every day when iron objects rust, or when scabs on cuts turn brown.

The chemical reaction is called "oxidation", and the enzyme that regulates oxidation in apples is called "polyphenol oxidase" (PPO), also known as "tyrosinase".
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