A nucleotide is composed of a five-carbon sugar that is attached to a phosphate group and a nitrogen-containing base.
Deoxyribose sugars connected to phosphate groups make up the DNA backbone. Chains are formed by the phosphodiester bonds connecting these units. By forming hydrogen bonds with the complementary base pairs of nitrogenous bases, which are attached to the sugars of these groups, DNA strands are joined together.
The monomers that make up nucleic acids are called nucleotides. They are made up of a phosphate group, a nitrogenous base, and a five-carbon sugar. A free hydroxyl group on the 3' carbon of the following nucleotide forms an ester link with the phosphate group connected to the 5' carbon of the sugar on the first nucleotide.
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