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MCQs

Total Questions : 99 | Page 7 of 10 pages
Question 61. . Which disinfectant was the most effective against Salmonella"?
  1.    Phenol
  2.    Cetylpyridinium chloride
  3.    Hexachlorophene
  4.    Merthiolate
 Discuss Question
Answer: Option D. -> Merthiolate
Question 62. . If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food?
  1.    Obligate Aerobe
  2.    Acidophile
  3.    Mesophile
  4.    Obligate Anaerobe
 Discuss Question
Answer: Option D. -> Obligate Anaerobe
Question 63. . Which of the following skin disinfectant(s) is/are most frequently used?
  1.    Isopropyl alcohol
  2.    Ethyl alcohol
  3.    Both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 64. . Bactericidal concentration of phenol is
  1.    0.25%
  2.    0.5%
  3.    0.75%
  4.    1%
 Discuss Question
Answer: Option D. -> 1%
Question 65. . Which of the following is most effective for sterilizing mattresses and plastic petri plates?
  1.    Chlorine
  2.    Ethylene oxide
  3.    Glutaraldehyde
  4.    Ultraviolet radiation
 Discuss Question
Answer: Option B. -> Ethylene oxide
Question 66. . All of the following are sporicidal except
  1.    glutaraldehyde
  2.    ethylene oxide
  3.    formaldehyde
  4.    alcohol
 Discuss Question
Answer: Option D. -> alcohol
Question 67. . The process of making an object free from living organisms including bacterial and fungal spores and viruses is known as
  1.    pasteurization
  2.    antisepsis
  3.    disinfection
  4.    sterilization
 Discuss Question
Answer: Option D. -> sterilization
Question 68. . Which of the following describes the effect of ionizing radiation on microbes?
  1.    Changes the 3-dimensional structure of proteins to a 2-dimen-sional form
  2.    Substantially decreases enzymatic activity, slowing microbial reproduction
  3.    Induces electrons and protons to jump out of the molecules of the microbe
  4.    None of the above
 Discuss Question
Answer: Option C. -> Induces electrons and protons to jump out of the molecules of the microbe
Question 69. .  Media containing spores and thermolabile constituents are sterilized by
  1.    pasteurization
  2.    UV radiation
  3.    dry heat
  4.    tyndalization
 Discuss Question
Answer: Option B. -> UV radiation
Question 70. . Ethylene oxide is used to destroy or kill which of the following microbes?
  1.    Bacteria
  2.    Spores
  3.    Fungi
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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