Eukaryotic and Prokaryotic cells

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  • Created by: Brandy
  • Created on: 07-03-13 19:39

Prokaryotic Cells

  • Bacteria and cyanobacteria
  • No nuclei found
  • Extremely small (less than 5 μm)
  • DNA lies free in cytoplasm
  • A cell wall is always present

Structure + Function

  • Plasmid - small circle of DNA
  • Capsule - Slimy layer on surface for protection and to prevent dehydration
  • Pili - thin, prtoein tubes allow bacteria to adhere to surface
  • Flagellum - hollow cylindrical thread-like structure rotates to move the cell
  • Ribosome - A very small organelle that floats free in the cytoplasm, the site where proteins are made
  • Cell wall - contains peptidoglycan, a type of polysaccharide and polypeptide combined
  • Cytoplasm
  • Cell surface membrane

Plasmid, capsule, pili and flagellum might not always be present.

Eukaryotic Cells

  • All other living organism
  • nuclei, mitochondria and chloroplast(only in plants) found 
  • Larger (20 μm or more)
  • a cell wall is not always present

Structure + Function

  • Centriole - one pair in every cell, hollow cylinders made up of a ring of nine protein microtubules(polymers of globular proteins arranged in a helix to form a hollow tube). They are involved in the formation of the spindle during nuclear division and in transport within the cell cytoplasm.
  • Lysosome - spherical sacs containing digestive enzymes and bound by a single membrane. Involved in the breakdown of unwanted structures within…


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