These questions are in regards to Physiological characteristics of Bacteria and

ID: 58198 • Letter: T

Question

These questions are in regards to Physiological characteristics of Bacteria and streaking for isolation.

Part A

1) What causes Brownian motion?

2) How can we distinguish Brownian motion from true motility?

3) What morphological group of bacteria is considered to be the least motile?

4) Can bacterial flagella be seen under the light microscope? Explain

5) What is the axial filament found in the spirochetes?

Part B

Classify the oxygen requirements for each organism

1) Bacillus megaterium

2) Penicillium chrysogenum

3) Micrococcus luteus

4) Staphylococcus aureus

5) Clostridium spp.

1) Bacillus megaterium Aerobic ( use oxygen as electron acceptor)

2) Penicillium chrysogenum- Aerobic

) Micrococcus luteus- anaerobe ( use oxygen as electron acceptor)

4) Staphylococcus aureus facultative aerobe (will use oxygen when present)

5) Clostridium spp. -anaerobes (oxygen is not used as final electron acceptor)

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