| 6. | How many cells present per millilitre in a bacterial culture can make the culture turbid? |
| a. | cell |
| b. | 000 cells |
| c. | lakh cells |
| d. | 07-108 cells |
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Answer: (d).07-108 cells
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| 7. | A dead cell does not contribute to turbidity in the culture medium. |
| a. | True |
| b. | False |
| c. | May be |
| d. | Can't say |
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Answer: (b).False
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| 8. | Which of the following is a direct measurement of growth? |
| a. | Determination of nitrogen content |
| b. | Turbidimetric methods |
| c. | Determination of Dry weight of cells |
| d. | Measurement of a specific chemical change produced on a constituent of the medium |
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Answer: (c).Determination of Dry weight of cells
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| 9. | Which of the following method is used for enumeration of bacteria in vaccines and cultures? |
| a. | Microscopic Count |
| b. | Membrane filter |
| c. | Plate count |
| d. | Dry weight determination |
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Answer: (a).Microscopic Count
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| 10. | Colony-forming units per ml is the unit of _____________ |
| a. | Microscopic count |
| b. | Electronic enumeration |
| c. | Plate count |
| d. | Turbidimetric measurement |
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Answer: (c).Plate count
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