Biology ultrastructure of cells 1

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  • Created by: Abby1907
  • Created on: 13-03-14 16:08
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  • Ultrastructure of cells
    • Nucleus
      • Largest organelle
      • Surrounded by double membrane
        • Contains pores
      • Contains chromosomes
        • Dispersed into diffuse network called chromatin
        • Only become visible when cell divides
      • One or more nucleoli
      • Nucleolus is a tiny, highly stainable body
        • Makes ribosomes
    • Mitochondria
      • Usually rod-shaped
      • Quite large
      • Surrounded by double membrane
        • Outer membrane - smooth
        • Inner membrane - highly folded
          • To form CRISTAE
      • Interior of mitochondrian is watery solution of metabolites + enzymes
        • Called MATRIX
    • Ribsomes
      • Minute structures
      • No membrane
      • Made of protein and RNA
      • Sites of protein synthesis
      • Cell components + enzymes made here
    • Endoplasmic Reticulum
      • Rough
        • Ribsomes attached
          • Site of synthesis of proteins
        • Vesicles formed at end
          • Become picked off
          • Vesicles package products for transport
      • Smooth
        • No ribosomes
        • Synthesises substances needed by cells
      • Folded membranes

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