Q. Which among the following helps us in getting a three-dimensional picture of the specimen?

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Q. The secondary electrons radiated back in scanning microscope is collected by?

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Q. On what factors do the intensity of secondary electrons depends upon?

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Q. Where do we obtain the magnified image of the specimen in SEM?

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Q. Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure?

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Q. The dye eosinate of methylene blue belongs to which group?

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Q. What is the correct order of staining reagents in Gram-Staining?

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Q. Which bacteria appears purple-violet colour after staining?

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Q. Which of the following are true for Gram-negative bacteria?

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Q. Gram-positive bacteria are usually more susceptible to?

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Q. Which of the staining technique helps in demonstrating spore structure in bacteria as well as free spores?

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Q. In Gram-staining, iodine is used as a______________

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Q. Which of the following is the example of Gram-negative bacteria?

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Q. In which of the following situations will the logarithmic plot of survivors be constant?

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Q. A suspension of E.coli exposed to a heat treatment may yield a greater number of survivors if a plating medium of _____________ is used.

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Q. We require less time to kill the population of many cells.

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Q. The effectiveness of heat in killing microorganisms is much greater in _____________

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Q. A high concentration of which of the following compounds in the material generally increases the thermal resistance of microorganisms?

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Q. Which of the following show the maximum resistance to physical and chemical agents?

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Q. How much time is required by the young cells to be killed by a lethal agent?

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