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Hace 1 día · DNA, organic chemical of complex molecular structure found in all prokaryotic and eukaryotic cells. It codes genetic information for the transmission of inherited traits. The structure of DNA was described in 1953, leading to further understanding of DNA replication and hereditary control of cellular activities.
The structure of DNA is dynamic along its length, being capable of coiling into tight loops and other shapes. In all species it is composed of two helical chains, bound to each other by hydrogen bonds. Both chains are coiled around the same axis, and have the same pitch of 34 ångströms (3.4 nm).
DNA and its building blocks. DNA is made of four types of nucleotides, which are linked covalently into a polynucleotide chain (a DNA strand) with a sugar-phosphate backbone from which the bases (A, C, G, and T) extend. A DNA molecule is composed of two (more...)
21 de ene. de 2021 · Learn about the structure of DNA, the double helix, the nucleotides, the base pairs, and the discovery by Watson, Crick, and Franklin. Compare DNA with RNA and understand DNA replication.
9 de oct. de 2019 · How Watson and Crick discovered the helical structure of double-stranded DNA in 1953, based on X-ray diffraction data and chemical evidence. Learn about the history, the challenges and the implications of this groundbreaking research that changed biology and genetics.
Descubrimiento del ADN. Descubrimiento de la estructura del ADN. Google Classroom. La estructura de doble hélice del ADN y cómo se descubrió. Chargaff, Watson y Crick, Wilkins y Franklin. Introducción. Hoy en día, la doble hélice del ADN es probablemente la más emblemática de todas las moléculas biológicas.
The basic structure of DNA is a double helix, which consists of two long strands of DNA wrapped around each other. Each strand consists of many nucleotides, each consisting of a sugar and phosphate group, which form the sugar-phosphate backbone of DNA, and a nitrogenous base, which determines the identity of each nucleotide.
