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The Nucleus

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Subject: 
Biology
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Tags: 
Biology
Cell Biology
Membrane biology
organelles
Protein families
Lamin
Cell nucleus
Nuclear pore
Nuclear lamina
Nuclear membrane
Nucleolus
LMNA

The Nucleus Functions of the nucleus Storage of genes on chromosomes Transportation of regulatory factors & gene products via nuclear pores Separation of: DNA from cytosol Transcription from translation Organisation of: genes into chromosomes (to allow cell division) uncoiling of DNA to replicate key genes Production of: messenger RNA ( mRNA ) that code for proteins ribosomal RNA (rRNA) in the nucleolus Components within the nucleus Nuclear envelope: double membrane, each membrane is a phospholipid bilayer Nuclear pore: controls entry and exit from the nucleus e.g. of RNA proteins Nuclear lamina: a series of structural proteins found on the inner membrane of the nuclear envelope, provide structural support Nuclear matrix: scaffold proteins Nucleoplasm: viscous medium

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