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The Chemistry Of Fruit Browning

By Janice VanCleave

Why do apple slices turn brown? The peel of an apple prevents oxygen from coming in contact with the chemicals inside the apple. Cutting an apple breaks the cells of the apple. Thus the broken cells on the cut surface of the apple are exposed to oxygen in air. There are a series of chemical […]

Filed Under: Biology Tagged With: aerobic oxidation, apple browning, denatured, enzymes, melanin, organelles, pH, phenols, pigment, polyphenol oxidase

Vitamin: Coenzyme

By Janice VanCleave

Coenzyme

Some enzymes need a helper called a coenzyme. The job of some coenzymes is to help an enzyme do its job, which can be to put together or take apart molecules. Changes in molecules in your body can be called biochemistry. The diagram models the bonding of two molecules, A and B. 1. The coenzyme […]

Filed Under: Biology Tagged With: biochemistry, enzymes, vitamins

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Welcome to Janice’s Science Extravaganza!

The spoon hanging from the string vibrates when struck and these vibrations are transmitted through the string and the sound is amplified by the plastic cups. ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years. MORE.....

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