howcome banana turn brown?

Question

i need for the science fair pleaseee help me..................................................................... if not i will failed
science (science fair is due on Friday) turn in answer in wednesday an thursday.

Answer 1

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.


I really hope this helps you. Good luck on your fair project!!!

Bob

Answer 2

to add to bob's answer:

tyrosinase converts the amino acid tyrosine to melanin, which is a dark pigment.

Answer 3

banana turn brown because banana too old.

Buy new banana.