Q. Death of bacterial spores permits computation of death points which is independent of all explanation.

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Q. Which of the following is true about lethal mutation?

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Q. Which of the following methods is possible to kill bacteria?

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Q. Which of the following is true about death time curve method to sterilize canned food?

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Q. Statement 1: Heat resistance of an organism is designated by the ‘c’ value.
Statement 2: The ‘z’ value stands for the number of degrees centigrade required for the thermal death time curve to traverse one logarithmic cycle.

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Q. There is an existing relationship between the heat resistance of a vegetative cell and that of the spore formed thereafter.

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Q. Between the following factors, which of the following have maximum effect on highly heat resistant spores?

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Q. Statement 1: The physical environment in which a spore is grown has minimal affect on its heat resistance.
Statement 2: Freezing weakens spores.

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Q. Statement 1: Spores heated in soil directly are more heat resistant than ones which are mixed with sterile soils and then heated.
Statement 2: Thermophilic bacteria which form spores in artificial media are more heat resistant than those formed on machinery in canning plants.

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Q. Artificial media weakens cultures of organisms.

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Q. For a culture to be kept alive for a long time, the medium permitting limited growth is favourable than one which has enriched conditions.

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Q. Which of the following falls in the low acidic group?

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Q. Which of the following is true about clostridium botulinum?

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Q. Which of the following is true about corn?

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Q. Which of the following organisms have a high resisting effect at high temperatures?

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Q. Which of the following is true about clostridrium botulinum?

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Q. Which of the following spore forming bacteria may lead to overcooked and degraded canned food?

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Q. Thermophilic flat sour spoilage is due to _____

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Q. Statement 1: Thermophilic flat sour spoilage generally doesn’t take place at home.
Statement 2: Thermophilic flat sour spoilage has one difficulty that there is only formation of acids and no gas leaks.

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Q. Niti and Reeti go shopping. Niti picks up a pickle bottle which is slightly bulged. Reeti immediately asks her to keep it back saying that he bulging means it is spoiled. What could be the reason for the bulging?

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