base pair

(bays payr)

Molecules called nucleotides, on opposite strands of the DNA double helix, that form chemical bonds with one another. These chemical bonds act like rungs in a ladder and help hold the two strands of DNA together. There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).

Two nitrogen-containing bases pair together between double-stranded DNA; only specific combinations of these bases (e.g., adenine with thymine; guanine with cytosine) are possible, a fact which facilitates accurate DNA replication; when quantified (e.g., 8 base pairs, or bp), this term refers to the actual number of base pairs in a sequence of nucleotides.

Pronunciation of dictionary term "base pair"

DNA base pair; drawing shows double-stranded DNA with bonds between two pairs of  nitrogen-containing bases [adenine (A) and thymine (T), and cytosine (C) and guanine (G)].DNA base pair; drawing shows double-stranded DNA with bonds between two pairs of nitrogen-containing bases [adenine (A) and thymine (T), and cytosine (C) and guanine (G)].

Pares de bases de ADN; el recuadro muestra el ADN con doble hebra unido entre dos pares de bases que contienen nitrógeno [adenina (A) y timina (T), y citocina (C) y guanina (G)].Pares de bases de ADN; el recuadro muestra el ADN con doble hebra unido entre dos pares de bases que contienen nitrógeno [adenina (A) y timina (T), y citocina (C) y guanina (G)].

Moléculas que se llaman nucleótidos, en hebras opuestas de la doble hélice del ADN, que forman enlaces químicos entre sí. Estos enlaces químicos funcionan como los escalones en una escalera y ayudan a unir las dos hebras del ADN. En el ADN hay cuatro nucleótidos o bases: adenina (A), citosina (C), guanina (G) y timina (T). Estas bases forman pares específicos (A con T y G con C).

Base PairPar de Bases