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MCQs

Total Questions : 339 | Page 5 of 34 pages
Question 41. If two organisms are distantly related and show no DNA homology there still may be similarity in their rRNA cistrons.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 42. Which among the following kingdoms were proposed by Whittaker?
  1.    Monera
  2.    Protista,Fungi
  3.    Plantae,Animalia
  4.    Monera,Protista,Fungi,Plantae,Animalia
 Discuss Question
Answer: Option D. -> Monera,Protista,Fungi,Plantae,Animalia
Answer: (d).Monera,Protista,Fungi,Plantae,Animalia
Question 43. According to Bergey’s Manual of Systematic Bacteriology, prokaryotes that lack a cell wall belong to the group?
  1.    Gracilicutes
  2.    Firmicutes
  3.    Tenericutes
  4.    Mendosicutes
 Discuss Question
Answer: Option C. -> Tenericutes
Answer: (c).Tenericutes
Question 44. Which among the following come under Gram-positive eubacteria?
  1.    Clostridium
  2.    Actinomyces
  3.    Rhizobium
  4.    Clostridium,Actinomyces
 Discuss Question
Answer: Option D. -> Clostridium,Actinomyces
Answer: (d).Clostridium,Actinomyces
Question 45. Which of the following are characteristics of archaebacterial different from eubacteria?
  1.    methane-producers
  2.    extreme halophiles
  3.    thermoacidophiles
  4.    methane-producers,extreme halophiles,and thermoacidophiles
 Discuss Question
Answer: Option D. -> methane-producers,extreme halophiles,and thermoacidophiles
Answer: (d).methane-producers,extreme halophiles,and thermoacidophiles
Question 46. Which of the following is sterilized with the help of glutaraldehyde?
  1.    Thermometers
  2.    Bronchoscopes
  3.    Cystoscopes
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 47. The time in minutes at a specific temperature needed to kill a population of cells is the
  1.    decimal reduction time
  2.    thermal death point
  3.    thermal death temperature
  4.    F value
 Discuss Question
Answer: Option D. -> F value
Answer: (d).F value
Question 48. The lowest temperature that kills all microorganisms in a liquid suspension in 10 minutes is known as the
  1.    decimal reduction time
  2.    thermal death point
  3.    thermal death temperature
  4.    thermal death time
 Discuss Question
Answer: Option B. -> thermal death point
Answer: (b).thermal death point
Question 49. Which of the following is a limitation of the autoclave?
  1.    It takes too long to sterilize
  2.    It lacks the ability to inactivate viruses
  3.    It lacks the ability to kill endospores
  4.    It will destroy heat labile materials
 Discuss Question
Answer: Option D. -> It will destroy heat labile materials
Answer: (d).It will destroy heat labile materials
Question 50. Which of the following has most heat resistant spores?
  1.    Clostridium histolyticum
  2.    Clostridium perfringens
  3.    Bacillus stearothermophilus
  4.    Bacillus cereus
 Discuss Question
Answer: Option C. -> Bacillus stearothermophilus
Answer: (c).Bacillus stearothermophilus

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