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MCQs

Total Questions : 348 | Page 6 of 35 pages
Question 51. 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)
Answer: (a).Aerobic, glucose-respiring bacteria (aerobic respiration)
Question 52. 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)
Answer: (b).low levels of oxygen for growth (lesser than O2 present in atmosphere)
Question 53. 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
Answer: (c).lag phase
Question 54. 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
Answer: (a).doesn't use oxygen but can grow in the presence of oxygen
Question 55. 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
Answer: (d).obligate aerobe
Question 56. Which of the following have peritrichous flagella?
  1.    Acetobacter
  2.    Gluconobacter
  3.    Agrobacteria
  4.    Rhizobium
 Discuss Question
Answer: Option A. -> Acetobacter
Answer: (a).Acetobacter
Question 57. The cell diameter of bacteria belonging to family Enterobacteriaceae is ____________
  1.    1 m
  2.    1 cm
  3.    .3-1.5 micrometre
  4.    5 micrometre
 Discuss Question
Answer: Option C. -> .3-1.5 micrometre
Answer: (c)..3-1.5 micrometre
Question 58. Which of the following organism causes whooping cough in humans?
  1.    E.coli
  2.    Bordetella pertussis
  3.    Francisella tularensis
  4.    F.meningosepticum
 Discuss Question
Answer: Option B. -> Bordetella pertussis
Answer: (b).Bordetella pertussis
Question 59. What is the cell shape of the organisms belonging to the family Enterobacteriaceae?
  1.    vibrio
  2.    coccus
  3.    bacillus
  4.    straight rod
 Discuss Question
Answer: Option D. -> straight rod
Answer: (d).straight rod
Question 60. Bacteria belonging to the genus Legionella contains which of the following amino acid?
  1.    Lysine
  2.    Arginine
  3.    Glycine
  4.    Cysteine
 Discuss Question
Answer: Option D. -> Cysteine
Answer: (d).Cysteine

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