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Thursday, 3. July 2003
biology - notes - cells part IIa

"PROKARYOTIC"
--- Et. 'pro' before 'karyon' kernel ~ 'before the formation of the nucleus'
--- primitive
--- lacking membrane-bound organelles, with the exception of ribosomes

***

Parts (see handout for further reference)

  1. capsule / cell wall / slime layer - outermost covering of cell, protects cell and defines shape of cell
  2. cell membrane / plasma membrane / plasmalemma - same as cell wall; semi-permeable
  3. cytoplasm / hyaloplasm - fluid matrix in which all biochemical reactions occur
  4. ribosomes - organelles responsible for protein synthesis
  5. plasmid - circular piece of DNA of no known use to the cell but valuable to the field of genetic engineering
  6. pilus - used to attach to other cells for parasitism or DNA-sharing
  7. flagella - whip-like projection allowing movement/propulsion
  8. mesosome - connects cell membrane and cell's DNA

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