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Nucleus
Contains most of the DNA in an eukaryotic cell.
Ribosomes
Use the information from the DNA to make proteins.
Nuclear envelope
Encloses the nucleus, separating it from the cytoplasm.
Nuclear membrane
Double membrane consisting of a lipid bi-layer.
Pores
Regulate the entry and exit of molecules from the nucleus.
Nuclear lamina
Composed of protein, maintains the shape of the nucleus.
Chromosomes
DNA organized into discrete units.
Chromatin
DNA and proteins of chromosomes together.
Nucleolus
Located within the nucleus, site of rRNA synthesis.
Ribosomes
Complexes of ribosomal RNA and protein.
Free ribosomes
Carry out protein synthesis in the cytosol.
Bound ribosomes
Located on the outside of ER or nuclear envelope, carry out protein synthesis.
Note 
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