CIE Chemistry Advanced Subsidiary (AS) Level Practice Test

Hydrolysis of DNA would ultimately yield which building blocks?

Amino acids Fatty acids Monosaccharides Nucleotides

Correct Answer:

Nucleotides

Explanation:

DNA is a polymer built from nucleotides linked by phosphodiester bonds. When hydrolysis happens, these bonds are cleaved, releasing the monomer units. The building blocks of DNA are nucleotides, each containing a deoxyribose sugar, a phosphate group, and a nitrogenous base. So hydrolysis ultimately yields nucleotides. Amino acids form proteins, fatty acids form lipids, and monosaccharides form carbohydrates, so they’re not the products here.

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