Why is it necessary to incubate agar plates upside-down

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Assignment:

1. Why is it necessary to incubate agar plates upside-down?

2. Why don't you see flagella when using the Gram stain? What staining technique can be used to visualize these structures?

3. What could happen if you are viewing a specimen using the 100x objective, and you are focusing on the specimen using the coarse focus control? Why could this happen.

4. You inoculate EMB agar with a Gram positive bacterium that cannot ferment lactose species. Describe what you see, and why you will see this.

5. You inoculate mannitol-salt sagar with an unidentified bacterial species. The bacteria grow and there are no yellow zones around the growth. What can you say about this bacterial species?

Reference no: EM133231532

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