Nucleotide structure

This is the monomer of nucleic acids, the monomer is nucleotides.

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Nucleotides Structure

Learn the three parts of nucleotide. Compare nucleotides in DNA versus RNA. Explore the structure of nucleotide subunits.

Illustration of the structural components and building blocks of deoxyribonucleic acid.

Deoxyribonucleic acid (DNA) is the hereditary matter in cells that makes up the repository for genes. DNA's structure consists of sugar, phosphate groups,and nitrogenous bases in its nucleotides. These bases are cytosine, thymine, adenine, and guanine. Cytosine and thymine are classified as pyrimidines that have a single ring. Adenine and guanine are classified as purines that have a double rings. Adenine base pairs with thymine (uracil only in RNA), and cytosine base pairs with guanine.

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Ribonucleic acid (RNA) functions as genetic messengers and builders of the cellular world. Here are the basics of RNA and gene expression.