E-PolyLearning

61. Mesophiles are group of bacteria that grow within the temperature range of?
a. 0-20 degree Celsius
b. 25-40 degree Celsius
c. 45-60 degree Celsius
d. more than 60 degree Celsius
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Answer: (b).25-40 degree Celsius

62. Which of the following factors are responsible for the stability of thermophiles at high temperatures?
a. increased leakage of cell components
b. presence of large no. of polar amino acids and alpha-helix protein
c. thermal stability of ribosomes
d. presence of Inositol diphosphate and thermal stability of ribosomes
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Answer: (d).presence of Inositol diphosphate and thermal stability of ribosomes

63. The bacterium Staphylococcus aureus is which type of bacteria?
a. Psychrophile
b. Mesophile
c. Thermophile
d. Mesophile and psychrophile
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Answer: (b).Mesophile

64. Microaerophilic bacteria require low levels of oxygen for growth.
a. True
b. False
c. May be
d. Can't say
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Answer: (a).True

65. The Reactive Oxygen Species(ROS) poduced by some bacteria are degraded by which of the following enzymes?
a. Peroxidase
b. Lyase
c. Catalase
d. Superoxide dismutase, Catalase and Peroxidase
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Answer: (d).Superoxide dismutase, Catalase and Peroxidase