Q. Which of the following is true about spore formation by cells?

View solution

Q. Which of the following sentences is NOT true?

View solution

Q. The non-functioning of the enzymes in bacteria is a major reason of death of bacteria.

View solution

Q. Decreasing enzyme content is not a cause but rather a consequence of inhibited growth.

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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.

View solution

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

View solution

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

View solution

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

View solution

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.

View solution

Q. Artificial media weakens cultures of organisms.

View solution

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.

View solution

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

View solution

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

View solution

Q. Which of the following is true about corn?

View solution

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

View solution

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

View solution