Nucleotide - Wikipedia
Nucleotides are organic molecules composed of a nitrogenous base, a pentose sugar and a phosphate. They serve as monomeric units of the nucleic acid polymers – deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are essential biomolecules within all life-forms on Earth.

Nucleotide | Description, Types, Function, & Facts | Britannica
A nucleotide is any member of a class of organic compounds in which the molecular structure comprises a nitrogen-containing unit (base) linked to a sugar and a phosphate group.

Nucleotide Definition, Structure, and Function
What Is a Nucleotide? A nucleotide is an organic molecule that serves as the building block for nucleic acids like DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). These molecules consist of three primary components: a nitrogenous base, a sugar molecule, and one or more phosphate groups.

Nucleotide - National Human Genome Research Institute
A nucleotide is the basic building block of nucleic acids (RNA and DNA). A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base.

Nucleotide: Structure, Types, and Biological Functions
A nucleotide is a pentose sugar linked to a nitrogenous base and a phosphate molecule. Nucleotides are the building blocks of DNA. Figure: Nucleotide. The nitrogenous bases are derived from two-parent compounds – purines and pyrimidines.

What is DNA? Definition, Function & Structure - Cleveland Clinic
What is DNA? DNA is the set of instructions that make you, you. These instructions tell your body how to create organs and tissues, how to function and what you look like. You can think of DNA as a vast library of instruction manuals. It uses its own “language” to write the story of you that your cells can read.

What are Nucleotides? - Creative Proteomics
Nucleotides are organic molecules that serve as the building blocks of nucleic acids, such as DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). They are composed of three primary components: a nitrogenous base, a five-carbon sugar, and one or more phosphate groups.

Nucleotides: AP Biology Study Guide | Fiveable
Nucleotides are the basic building blocks of DNA and RNA. They consist of a sugar, a phosphate group, and a nitrogenous base.

19.1: Nucleotides - Chemistry LibreTexts
The repeating, or monomer, units that are linked together to form nucleic acids are known as nucleotides. The deoxyribonucleic acid (DNA) of a typical mammalian cell contains about 3 × 10 9 nucleotides.

Nucleotide - an overview | ScienceDirect Topics
Nucleotides in cells are the building blocks of RNA and DNA. Free nucleotides are involved in all major aspects of metabolism, and the importance of this is reflected in the careful regulation of their intracellular levels.