Topic 6
Terms
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- Average Cell Size
- 1 -3 micrometers
- Range of cell Size
- .2-100 micrometers
- the 5 Shapes of Bacteria are
-
1) Rod
2)coccus
3)helical
4)square/cube
5)Irregular - Rod =______= bacillus
- cylindrical
- coccus=_______
- spherical
- helical=_____=much variation
- spirillum
- Cells can divide in what types of planes
- one,two,three, and all planes
- cells that divide in one plane are called
- streptococcus, streptobacillus, or diplococcus
- These type of bacteria divide in only ONE plane
- Rods
- What do you get when cells divide in 2 planes
- Sheets of cells called tetrads
- What do you get when cells divide in 3 planes
- cube shaped packets of cells in sarcina arrangement (8 coccus cells)
- What do you get when cells divide in al planes
- irregular clusters of cells called staph arrangement
- The fine structure of procaryotic cells can be observed with....
- an electron microscope
- the gross morphology of a cell can be observed with ....
- a light microscope
- All bacteria have cell walls except for...
- mycoplasmas
- The functions of the cell wall are to give it shape and protect it from physical, chemical, and osmotic pressure.
- True
- Peptidoglycan is composed of what?
- cross linked repeating units of peptidoglycan
- name 2 types of sugars
-
NAM
NAG - NAM
- N- acetyle muramic acid
- NAG
- N-acetyl glucosamine
- Every organism on the planet has peptidoglycan
- FALSE- only bacteria
- Name the constituents of cell wall
- teichoic acid, lipoproteins, lipopolysaccharides, and proteoglycan
-
what joins the NAM structure together?
NAM.......NAM......
l l
NAG NAG - .......= little peptide amino acids
- many antibiotics work by
- selective toxicity, working by preventing the cross bridge formation of the peptides