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MCQs

Total Questions : 348 | Page 4 of 35 pages
Question 31. The organism which grows best above 45°C are called
  1.    psychrophilic
  2.    mesosphilic
  3.    thermophilic
  4.    any of these
 Discuss Question
Answer: Option C. -> thermophilic
Answer: (c).thermophilic
Question 32. Lag phase is also known as
  1.    period of initial adjustment
  2.    transitional period
  3.    generation time
  4.    none of these
 Discuss Question
Answer: Option A. -> period of initial adjustment
Answer: (a).period of initial adjustment
Question 33. Implicit factors
  1.    depend on developing microflora
  2.    can be synergistic
  3.    both (a) and (b)
  4.    none of the above
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 34. A microbe, which grows at temperatures above 95° C is most likely to be
  1.    an archaean
  2.    a fungus
  3.    a protozoan
  4.    none of these
 Discuss Question
Answer: Option A. -> an archaean
Answer: (a).an archaean
Question 35. Which of the following is used to grow bacterial cultures continuously?
  1.    Chemostat
  2.    Coulter Counter
  3.    Hemostat
  4.    Petroff-Hausser chamber
 Discuss Question
Answer: Option A. -> Chemostat
Answer: (a).Chemostat
Question 36. Organisms, using organic compounds as electron donors are called
  1.    lithotrophs
  2.    phototrophs
  3.    chemotrophs
  4.    organotrophs
 Discuss Question
Answer: Option D. -> organotrophs
Answer: (d).organotrophs
Question 37. The reproduction by budding occur in
  1.    Rhodopseudomonas acidophila
  2.    Hyphomicrobium vulgare
  3.    Bacillus subtilis
  4.    Both (a) and (b)
 Discuss Question
Answer: Option D. -> Both (a) and (b)
Answer: (d).Both (a) and (b)
Question 38. The cell reproduction in bacteria may occur by
  1.    binary fission
  2.    budding
  3.    fragmentation
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 39. During exponential growth, the growth rate is
  1.    number of generations per unit time
  2.    reciprocal of generation time
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option B. -> reciprocal of generation time
Answer: (b).reciprocal of generation time
Question 40. Starvation proteins are produced by a culture during which of the following segments of the growth curve?
  1.    Lag phase
  2.    Exponential phase
  3.    Stationary phase
  4.    Death phase
 Discuss Question
Answer: Option C. -> Stationary phase
Answer: (c).Stationary phase

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