DNA

The molecules inside cells that carry genetic information and pass it from one generation to the next. Also called deoxyribonucleic acid.

Source: NCI Dictionary of Cancer Terms

The molecular basis of heredity; encodes the genetic information responsible for the development and function of an organism and allows for transmission of that genetic information from one generation to the next. The DNA molecule is structured as a double-stranded helix held together by weak hydrogen bonds between purine-pyrimidine nucleotide base pairs: adenine (A) paired with thymine (T), and guanine (G) paired with cytosine (C). Also called deoxyribonucleic acid.

Source: NCI Dictionary of Cancer Terms

Structure of DNA. Most DNA is found inside the nucleus of a cell, where it forms the chromosomes. Chromosomes have proteins called histones that bind to DNA. DNA has two strands that twist into the shape of a spiral ladder called a helix. DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands. Genes are short pieces of DNA that carry specific genetic information.Structure of DNA. Most DNA is found inside the nucleus of a cell, where it forms the chromosomes. Chromosomes have proteins called histones that bind to DNA. DNA has two strands that twist into the shape of a spiral ladder called a helix. DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands. Genes are short pieces of DNA that carry specific genetic information.La mayor parte del ADN se encuentra en el interior del núcleo de una célula, donde forma los cromosomas. Los cromosomas contienen proteínas llamadas histonas que se unen al ADN. El ADN tiene dos hebras que se enroscan y forman una escalera de caracol que se llama hélice. El ADN se compone de cuatro componentes básicos que se llaman nucleótidos: adenina (A), timina (T), guanina (G) y citosina (C). Los nucleótidos se unen entre sí (A con T y G con C) para formar enlaces químicos llamados pares de bases, que conectan las dos cadenas de ADN. Los genes son pequeñas piezas de ADN que transportan información genética específica. Date last modified: 2015-02-09DNA (Deoxyribonucleic Acid)ADN (Ácido Desoxirribonucleico)