LIFE SCIENCE

Detailed explanation-1: -Because of its structure, DNA is commonly referred to as deoxyribonucleic acid. The nucleic acid has a phosphate backbone with bases such as adenine, cytosine, guanine, and thymine, while the deoxyribose portion contains pentose sugar. The-OH group at position two of the sugar ring is absent in deoxyribose.

Detailed explanation-2: -DNA is made up of a double-stranded helix held together by weak hydrogen bonds between purine-pyrimidine nucleotide base pairs: adenine (A) paired with thymine (T), and guanine (G) paired with cytosine (C). Also called deoxyribonucleic acid.