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MCQs

Total Questions : 339 | Page 10 of 34 pages
Question 91. How much percentage of aqueous solution of phenol rapidly kills the vegetative cells of microorganisms?
  1.    1%
  2.    2%
  3.    5%
  4.    10%
 Discuss Question
Answer: Option C. -> 5%
Answer: (c).5%
Question 92. The antimicrobial activity of phenolics is not reduced at which of the following conditions?
  1.    acidic pH
  2.    alkaline pH
  3.    low temperatures
  4.    presence of soap
 Discuss Question
Answer: Option D. -> presence of soap
Answer: (d).presence of soap
Question 93. Which of the following agents irreversibly oxidize and inactivate proteins with sulphydral groups?
  1.    Alcohol
  2.    Phenol
  3.    Iodine
  4.    Chlorine
 Discuss Question
Answer: Option C. -> Iodine
Answer: (c).Iodine
Question 94. Alcohol concentrations above 60% are effective against _________________
  1.    bacteria
  2.    fungi
  3.    germs
  4.    viruses
 Discuss Question
Answer: Option D. -> viruses
Answer: (d).viruses
Question 95. Polyvinylpyrrolidone (PVP) is a complex belonging to which group?
  1.    Phenolic compounds
  2.    Iodophors
  3.    Metals
  4.    Aldehyde
 Discuss Question
Answer: Option B. -> Iodophors
Answer: (b).Iodophors
Question 96. The oldest eukaryotic organisms are considered to be
  1.    diplomonads like Giardia
  2.    archaea
  3.    fungi
  4.    animals
 Discuss Question
Answer: Option B. -> archaea
Answer: (b).archaea
Question 97. The phospholipids present in cytoplasm membrane of eubacteria is mainly
  1.    phosphoglycerides
  2.    polyisoprenoid
  3.    phospholipoprotein
  4.    none of these
 Discuss Question
Answer: Option A. -> phosphoglycerides
Answer: (a).phosphoglycerides
Question 98. Which were the investigators lived at the same time?
  1.    Koch and Pasteur
  2.    Darwin and Woese
  3.    Van Leeuenhoek and Ricketts
  4.    Berg and Hooke
 Discuss Question
Answer: Option A. -> Koch and Pasteur
Answer: (a).Koch and Pasteur
Question 99. Mycoplasmas are different from the other prokaryotes by
  1.    presence of chitin in cell walls
  2.    presence of murrain in cell walls
  3.    presence of proteins in cell walls
  4.    absence of cell wall itself
 Discuss Question
Answer: Option D. -> absence of cell wall itself
Answer: (d).absence of cell wall itself
Question 100. The unifying feature of the archaea that distinguishes them from the bacteria is
  1.    habitats which are extreme environments with regard to acidity
  2.    absence of a nuclear membrane temperature
  3.    presence of a cell wall containing a characteristic outer membrane
  4.    cytoplasmic ribosomes that are 70S
 Discuss Question
Answer: Option B. -> absence of a nuclear membrane temperature
Answer: (b).absence of a nuclear membrane temperature

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