E-PolyLearning

66. Which of the following actions occur due to low temperature?
a. coagulation of proteins
b. death of microorganisms
c. rate of metabolism is reduced
d. denatures proteins
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Answer: (c).rate of metabolism is reduced

67. Which of the following are resistant to desiccation?
a. gonococci
b. streptococci
c. meningococci
d. bacillus
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Answer: (b).streptococci

68. Passage of water from a low solute concentration into the cell is referred to as ______________
a. plasmoptysis
b. plasmolysis
c. isotonic
d. hypertonic
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Answer: (a).plasmoptysis

69. Which of the following radiations have the energy to knock electrons away from molecules and ionize them?
a. Non-ionizing radiations
b. Acoustic radiations
c. Subatomic particles
d. Ionizing radiations
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Answer: (d).Ionizing radiations

70. Wavelengths around ___________ have the highest bactericidal efficiency.
a. 150 Å
b. 3900 Å
c. 2650 Å
d. 500 Å
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Answer: (c).2650 Å