Final answer:
The ribose/deoxyribose sugars in DNA bind to the phosphate group and nitrogenous bases of purines and pyrimidines respectively. A nucleoside is a molecule comprising a nitrogenous base bonded to a pentose sugar; a deoxyribonucleoside refers to those containing the deoxyribose sugar seen in DNA.
Step-by-step explanation:
A nucleoside is a compound that consists of a nitrogenous base (such as adenine, guanine, cytosine, or thymine) attached to a sugar molecule (ribose or deoxyribose) without the phosphate group. A deoxyribonucleoside specifically refers to a nucleoside that contains the sugar deoxyribose, which is present in DNA, as opposed to ribose, which is found in RNA. Deoxyribonucleoside specifically forms the structural framework of DNA when combined with a phosphate group, resulting in a nucleotide.
In other words, nucleosides form the basic building blocks of nucleic acids DNA and RNA, with a deoxyribonucleoside being a component specifically of DNA due to its deoxyribose sugar. When the phosphate group is added to a nucleoside, it then becomes a nucleotide, the monomer unit of nucleic acids.