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MCQs

Total Questions : 137 | Page 6 of 14 pages
Question 51. When a substance is added to a solid medium which inhibits the growth of unwanted bacteria but permits the growth of wanted bacteria, it is known as
  1.    differential medium
  2.    enriched medium
  3.    enrichment medium
  4.    selective medium
 Discuss Question
Answer: Option D. -> selective medium
Answer: (d).selective medium
Question 52. Treponema species from human oral cavity can be selected by using
  1.    pH of the medium
  2.    incubation temperature
  3.    cell size and motility
  4.    all of these
 Discuss Question
Answer: Option C. -> cell size and motility
Answer: (c).cell size and motility
Question 53. Main function of an enzyme is to
  1.    increase the activation energy
  2.    decrease the activation energy
  3.    maintain constant activation energy
  4.    none of these
 Discuss Question
Answer: Option B. -> decrease the activation energy
Answer: (b).decrease the activation energy
Question 54. The inactive organic molecular portion of enzyme is
  1.    apoenzyme
  2.    coenzyme
  3.    holoenzyme
  4.    none of these
 Discuss Question
Answer: Option B. -> coenzyme
Answer: (b).coenzyme
Question 55. The inactive protein from of enzyme is
  1.    apoenzyme
  2.    enzyme
  3.    haloenzyme
  4.    cofactor
 Discuss Question
Answer: Option A. -> apoenzyme
Answer: (a).apoenzyme
Question 56. Many enzymes consists of a protein combined with low molecular weight organic molecule called as
  1.    apoenzyme
  2.    co-enzyme
  3.    holoenzyme
  4.    co-factors
 Discuss Question
Answer: Option B. -> co-enzyme
Answer: (b).co-enzyme
Question 57. Who coined the word enzyme first?
  1.    Kuhne
  2.    Pasteur
  3.    Liebig
  4.    Buchner
 Discuss Question
Answer: Option A. -> Kuhne
Answer: (a).Kuhne
Question 58. Disease-producing species occurring in a mixed culture can be selected by taking advantage of _________
  1.    its pathogenic properties
  2.    special carbon source
  3.    special nitrogen source
  4.    toxic chemicals
 Discuss Question
Answer: Option A. -> its pathogenic properties
Answer: (a).its pathogenic properties
Question 59. A large cluster of colonies are obtained in streak plate method.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: Use of dilute media
Question 60. Roll-tube technique is used to isolate ___________
  1.    aerobes
  2.    anaerobes
  3.    facultatives
  4.    stringent anaerobes
 Discuss Question
Answer: Option D. -> stringent anaerobes
Answer: (d).stringent anaerobes

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