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Núcleo celular

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Este documento esta hecho de apuntes de mi carrera de enfermería.

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Núcleo
Celular
• Región celular que contiene el material genético de los organismos eucariotas, almacena
información hereditaria y controla el metabolismo celular.

CONSTA DE DOS PARTES:
• Carioteca
• Región intranuclear


Antecedentes
• Walter Flemming observo “la danza de los cromosomas”
• Quiere decir los procesos de duplicación, alineación y separación de las cromatides que ocurren
cuando se dividen las células eucariotas.
• Experimentos en amebas.


carioteca
• La envoltura del núcleo (carioteca) se compone de dos membranas y controla el paso de los
materiales entre el núcleo y el citoplasma.
• En intervalos se fusionan en los llamados poros nucleares.


Región intranuclear
• Casi todo el ADN de la célula se localiza en el interior del núcleo.
• Las moléculas de ADN se componen de genes, ellas tienen las instrucciones codificadas
químicamente para la producción de las proteínas.
• La cromatina es la asociación del ADN con proteínas, observada como una red irregular de
gránulos y cadenas, en células que no están en división.

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Written in
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