Answer the Following Questions 1. Bacteria are the most widely distmbuted organi

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Answer the Following Questions 1. Bacteria are the most widely distmbuted organism in the biosphere. Tor F 2. Bacteria occur as part of the normal flora of humans'. Tor F cteria occupy sites on surfaces such as the skin and intestinal tract of humans. Tor Bacteria degrade sewage & waste, and are active in recycling nitrogen & carbon. Tor include: fliform, echinulate, beaded, efluse, arborescent, rhizoid. (pg. 24). surface, subsurface and sediment characteristics (pg. 248). Tor F covers: configurations, margins, elevations (pg. 250). Tor F 4. 5. Macroscopic characteristics for bacterial cultures grown on nutrient agar slants or 6. Macroscopic characteristics for bacterial cultures grown in nutrient broth include: 7. tics for bacterial cultures grown on 8. Why is the level of contamination measured as the number of colonics rather than the size of colonies? 9. Compare the ribosomes of prokaryotes to the ribosomes eukaryotes. Prokaryotes . (Hint: A Svedberg unit ribosomes are & Eukaryotic ribosomes are (symbol S) is a unit ofsedimentation rate. The test is performed in a test tube, which is under the centrifugal force of a centrifuge, and it enables the characterization of macromolecules based on size and shape). See Talaro -page 116, Table 45, types of ribosomes for bacteria, archaca, and cukarya). 10·List the motility mechanisms in bacteria 11. List the motility mechanisms in eukaryotic microorganisms

Explanation / Answer

1. T

2. T

3. T

4. T

5. T

6.T

7.T

8. Since every colony is made from a solitary cell, the quantity of settlements demonstrates the quantity of cells initially present or level of combination. colony measure reflects development rate or motility.

9. prokaryotic ribosomes are smaller (70S) as compared to eukaryotic ribosomes (80S) bigger.

Eukaryotic ribosomes are bigger. They comprise of a 60S larger subunit and a 40S little subunit, which meet up to frame a 80S molecule having a mass of 4200 kd, contrasted and 2700 kd for the prokaryotic 70S ribosome. The 40S subunit contains a 18S RNA that is homologous to the prokaryotic 16S RNA.

10.

a.tumble movment

b. spiral/ rotation motility

c. gliding motility

11.

mostaly Ciliar and flagella motility.

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