| 61. | Which of the following hint(s) suggest/s that a given specimen is likely to contain anaerobic bacteria? |
| a. | Gas in specimen |
| b. | Foul odour |
| c. | Presence of sulphur granules |
| d. | All of these |
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Answer: (d).All of these
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| 62. | Viable plate count can be obtained using |
| a. | Spread plate method |
| b. | Pour plate method |
| c. | both (a) and (b) |
| d. | Hemocytometer |
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Answer: (c).both (a) and (b)
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| 63. | In the pour plate method, the mixed culture is diluted directly in tubes of |
| a. | liquid agar medium |
| b. | sterile liquid usually water |
| c. | both (a) and (b) |
| d. | none of these |
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Answer: (a).liquid agar medium
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| 64. | Treponema species from human oral cavity can be selected by using |
| a. | pH of the medium |
| b. | incubation temperature |
| c. | cell size and motility |
| d. | all of these |
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Answer: (c).cell size and motility
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| 65. | When a substance is added to a solid medium which inhibits the growth of unwanted bacteria but permits the growth of wanted bacteria, it is known as |
| a. | differential medium |
| b. | enriched medium |
| c. | enrichment medium |
| d. | selective medium |
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Answer: (d).selective medium
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