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MCQs

Total Questions : 119 | Page 12 of 12 pages
Question 111. . The fragmentation occurs in
  1.    Streptomyces species
  2.    Nocardia species
  3.    Bacillus subtilis
  4.    None of these
 Discuss Question
Answer: Option B. -> Nocardia species
Question 112. . The term obligate anaerobe refers to an organism that
  1.    doesn't use oxygen but tolerates it
  2.    is killed by oxygen
  3.    uses oxygen when present or grows without oxygen when oxygen is absent
  4.    prefers to grow without oxygen
 Discuss Question
Answer: Option B. -> is killed by oxygen
Question 113. . Microaerophilic bacteria are those which require
  1.    21 % oxygen for growth
  2.    low levels of oxygen for growth (lesser than O2 present in atmosphere)
  3.    oxygen for activation of enzymes
  4.    none of the above
 Discuss Question
Answer: Option B. -> low levels of oxygen for growth (lesser than O2 present in atmosphere)
Question 114. . An organism is completely dependent on atmospheric O2 for growth. This organism is
  1.    osmotolerant
  2.    acidophile
  3.    facultative anaerobe
  4.    obligate aerobe
 Discuss Question
Answer: Option D. -> obligate aerobe
Question 115. . Which of the following organisms typically get their carbon for biosynthesis from organic compounds?
  1.    Aerobic, glucose-respiring bacteria (aerobic respiration)
  2.    Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
  3.    Photosynthetic cyanobacteria (phototrophic metabolism)
  4.    None of the above
 Discuss Question
Answer: Option A. -> Aerobic, glucose-respiring bacteria (aerobic respiration)
Question 116. . The fragmentation occurs in
  1.    Streptomyces species
  2.    Nocardia species
  3.    Bacillus subtilis
  4.    None of these
 Discuss Question
Answer: Option B. -> Nocardia species
Question 117. . The term aerotolerant anaerobe refers to an organism that
  1.    doesn't use oxygen but can grow in the presence of oxygen
  2.    is killed by oxygen
  3.    requires less oxygen than is present in air
  4.    prefers to grow without oxygen
 Discuss Question
Answer: Option A. -> doesn't use oxygen but can grow in the presence of oxygen
Question 118. . The term obligate anaerobe refers to an organism that
  1.    doesn't use oxygen but tolerates it
  2.    is killed by oxygen
  3.    uses oxygen when present or grows without oxygen when oxygen is absent
  4.    prefers to grow without oxygen
 Discuss Question
Answer: Option B. -> is killed by oxygen
Question 119. . The period between inoculation of bacteria in a culture medium and beginning of multiplication is known as
  1.    stationary phase
  2.    log phase
  3.    lag phase
  4.    decline phase
 Discuss Question
Answer: Option C. -> lag phase

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