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Hace 3 días · 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).
Learn how DNA is a polymer of nucleotides with four bases (A, T, G, C) that form a double helix structure. Understand how DNA stores and expresses genetic information and how enzymes interact with it.
21 de ene. de 2021 · Learn about the structure of DNA, the double helix, the nucleotides, the base pairs, and the discovery of DNA by Watson, Crick, and Franklin. Compare DNA with RNA and understand DNA replication.
A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each of these chains is known as a DNA chain, or a DNA strand. Hydrogen bonds between the base portions of the nucleotides hold the two chains together ( Figure 4-3 ).
Aprende cómo se descubrió la doble hélice del ADN con el trabajo de Watson, Crick, Franklin y otros investigadores. Conoce las propiedades y componentes de esta molécula biológica esencial.
9 de oct. de 2019 · The structure of DNA. In the early 1950s, the identity of genetic material was still a matter of debate. The discovery of the helical structure of double-stranded DNA settled the matter — and...
