Biology- cells and magnification

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Magnification

1mm=1000 micrometers

1 micrometre= 1000 nanometres so a nanometre is 0.000000001 metres or 1 x 10^-9 m

Magnification = image size/ size of real object

Image size = magnification  * size of real object

Size of real object = iimage size/ magnification

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Prokaryotic and Eukaryotic cells

Prokaryotic cells

  • Bacteria
  • Unicellular
  • Much smalller than eukaryotic cells 
  • Plasmids

Eukaryotic cells

  • Animals and plants
  • Multicellular
  • Membrane bound organelles e.g. a nucleus

Both

  • Both have cell membrane
  • Both have DNA
  • Both have ribosomes
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