| 41. | Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni? |
| a. | Vacomycin |
| b. | Polymyxin |
| c. | Trimethoprim |
| d. | None of these |
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Answer: (d).None of these
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| 42. | To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of |
| a. | 8.5 |
| b. | 8.90 |
| c. | 6.79 |
| d. | 3.5 |
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Answer: (a).8.5
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| 43. | For the selection of endospore-forming bacteria, a mixed culture can be heated at |
| a. | 80°C for 10 minutes |
| b. | 70°C for 10 minutes |
| c. | 60°C for 10 minutes |
| d. | 90°C for 10 minutes |
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Answer: (a).80°C for 10 minutes
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| 44. | The concentration of agar to obtain semi solid media is |
| a. | 1.5-20% |
| b. | 0.5% or less |
| c. | >10% |
| d. | >10%but<20% |
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Answer: (b).0.5% or less
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| 45. | Which of the following bacteria dies quickly after drying? |
| a. | Treponema pallidium |
| b. | Mycobacterium tuberculosis |
| c. | Staphylococcus aureus |
| d. | Pseudomonas aeruginosa |
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Answer: (a).Treponema pallidium
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