Saturday, October 24, 2009

homework 10/23/09

This week in science we learned all about different bacteria, arrangements and reviwed our results of the grams test!

Bacteria
  1. Bacillus - a rod shaped bacteria - a tic- tac (real life similarity)
  2. Cocci - a circle shaped bacteria - a ball (real life similarity)
  3. Spirillum - a spiral or stringy shaped bacteria - some string (real life similarity)

Arrangements

  1. Diplo - a pair ~ diplococcus
  2. Strepto - a chain ~ streptospirilum
  3. Tetra - a group of four ~ tetracoccus
  4. Staphylo - a clump ~ straphylococcus

For the grams test our main question was : What type of bacteria is this?

Once we were finished with our grams test, the results turned the color of red. According to our other research if the color is reddish than its gram negative which means taking up more counterstain. This makes the gram negative bacterias turn red or pink since it cannot contain the light violet color. On the other hand gram positive would turn a drak blue or a violet beacuse of its high amount of pepidoglycan in the cell wall. Lastly, when we were using the strioscope our group obesrved that the bacteria could possibly be a bacillus bacteria, but we will find out more information on Monday.

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