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Il Dna

ciao
by

Fabio Carlucci

on 22 November 2012

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Transcript of Il Dna

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli La mitosi è il processo attraverso il quale la cellula eucariota da origine a due cellule figlie indentiche alla cellula madre con lo stesso numero di cromosomi.
E' costituita da quattro fasi: Il dna ovvero
desossinionucleico La molecola di dna è formata da due lunghi filamenti a formare una doppia elica.
Questi ultimi sono formati da neoclotidi costituiti alloro volta da molecole di acido fosforico,molecola di zucchero e basi azotate



Le basi azotate sono quattro:citosina con guanina e timina con adenina. Mitosi la
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