Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Chapter 6, Problem 2MCQ
Two culture media were inoculated with four different bacteria. After incubation, the following results were obtained:
| Organism | Medium 1 | Medium 2 |
| Escherichia coli | Red colonies | No growth |
| Staphylococcus aureus | No growth | Growth |
| Staphylococcus epidermidis | No growth | Growth |
| Salmonella enterica | Colorless colonies | No growth |
2. Medium 2 is
- a. selective.
- b. differential.
- c. both selective and differential.
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Blood agar contains intact sheep red blood cells which are used to determine if a microbe has the ability to lyse these cells. This agar is properly termed
A. a selective differential medium
B. a complex medium
C. a differential medium and a complex medium
D. a selective medium
This agar plate was obtained by spreading 0.1 ml of a 1:1,000 dilution of a bacterial sample taken from cole slaw, and then incubating at 37oC for 24h. This plate indicates that:
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Chapter 6 Solutions
Microbiology: An Introduction
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