E-PolyLearning

51. We require less time to kill the population of many cells.
a. True
b. False
c. May be
d. Can't say
View Answer Report Discuss 50-50!
Answer: (b).False

52. The effectiveness of heat in killing microorganisms is much greater in _____________
a. acid
b. alkali
c. neutral
d. acid and alkali
View Answer Report Discuss 50-50!
Answer: (a).acid

53. A high concentration of which of the following compounds in the material generally increases the thermal resistance of microorganisms?
a. proteins
b. carbohydrates
c. lipids
d. salts
View Answer Report Discuss 50-50!
Answer: (b).carbohydrates

54. Which of the following show the maximum resistance to physical and chemical agents?
a. Viruses
b. Mold spores
c. Bacterial spores
d. E.coli
View Answer Report Discuss 50-50!
Answer: (c).Bacterial spores

55. How much time is required by the young cells to be killed by a lethal agent?
a. 24 hours
b. 3-4 hours
c. 30 mins
d. 5 mins
View Answer Report Discuss 50-50!
Answer: (c).30 mins