Cell structure and organelles

Nucleus

  • Contains genetic material - DNA
  • Main site of DNA and RNA synthesis
  • Compartmentalises DNA
  • Nuclear envelope continuous with ER
    • Image obtained from http://www.zum.de/Faecher/Materialien/beck/bs11-55.htm
  • Nuclear pores
  • External intermediate filaments
  • Internal IFs=nuclear lamina
  • Centromeres
  • Chromosomes
  • Nuclear envelope defines the nuclear compartment
  • Penetrated by nuclear pore complexes
  • Inner and outer membrane possess assymetry
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