Friday 3 January 2014

The appearance, ultrastructure and function of the nucleus.

Nucleus:
  • Nuclear envelope
    • Double membrane
    • Controls the movement of substances in and out of the nucleus
    • Can have ribosomes on the surface
    • Can be continuous with (joined/next to) endoplasmic reticulum
  • Contains chromatin
    • DNA for the cell
    • Form chromosomes take when the cell is not dividing
  • Nucleolus
    • Makes rRNA (coding for ribosomes)
    • Assembles ribosomes
  • Makes mRNA (coding for proteins) and controls protein synthesis
  • Nucleoplasam
    • Viscous liquid
    • Molecules and organelles of the nucleus suspended in it
    • Holds the structure of the nucleus
thelogos.co.uk

Not to scale

No comments:

Post a Comment