Concept Questions - Chapter 3
Take some time to write out answers to these questions. If you can answer them, you have a good grasp of the material!

1. Explain what is involved in isolating microorganisms and why it is necessary to do this.

2. Compare and contrast two common laboratory techniques for separating bacteria in a mixed sample.

3. Briefly explain how an image is made and magnified.

4. How can one obtain 2000X magnification with a 100X objective?

5. Differentiate among the ingredients and functions of enriched, selective, and differential media.

6. What kind of medium might you make to selectively grow a bacterium that lives in the ocean?

7. What kind of medium might you make to selectively grow a bacterium that lives in the human stomach?

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