Question

A slice of apple acquires a brown colour if it is not consumed immediately, explain

Answer 1

We all know that organic matter is made of millions upon billions of tiny cells of varying kinds. These cells also contain different types of enzymes. One of those enzymes that is present in the flesh of both apples and humans is called Polyphenol Oxidase (commonly abbreviated as PPO).

When polyphenol oxidase comes in contact with oxygen present in the environment, it turns the phenolic compounds present in the apple tissues into brown-colored products, imparting a brownish tinge to the freshly cut apple.

Answer 2

A slice of apple acquires a brown colour , because when apple is cut the oxygen introduced in the injured cells and hence oxidize it.