Q. How many cells present per millilitre in a bacterial culture can make the culture turbid?

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Q. A dead cell does not contribute to turbidity in the culture medium.

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Q. Which of the following is a direct measurement of growth?

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Q. Which of the following method is used for enumeration of bacteria in vaccines and cultures?

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Q. Colony-forming units per ml is the unit of _____________

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Q. Isolation of pure culture refers to ___________

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Q. Enrichment media allows the growth of a large number of varied bacterial species.

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Q. Which of the following is not a physical method for selection of pure culture?

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Q. In physical method of selection, endospore-forming bacteria can be obtained by heating the mixed culture to _____________

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Q. Vibrio cholerae can grow in a medium with a pH of _______

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Q. Disease-producing species occurring in a mixed culture can be selected by taking advantage of _________

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Q. Treponema sp. can be selected by taking advantage of ____________

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Q. A large cluster of colonies are obtained in streak plate method.

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Q. Roll-tube technique is used to isolate ___________

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Q. In pour-plate method,the medium should be maintained at what temperature?

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Q. Which of the following method can be used to determine the number of bacteria quantitatively?

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Q. Dilution of the mixed culture is a common step in all the three methods: the streak-plate,the spread-plate and the pour-plate technique.

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Q. Which of the following are not performed in lyophilization?

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Q. Which of the following is a function of cryoprotective agents?

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Q. What is the temperature of liquid nitrogen?

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