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MCQs

Total Questions : 274 | Page 7 of 28 pages
Question 61. Circular 'DNA' present in prokaryotes has molecular weight
  1.    2 x 10^7
  2.    2 x 10^8
  3.    2 x 10^10
  4.    2 x 10^9
 Discuss Question
Answer: Option D. -> 2 x 10^9
Answer: (d).2 x 10^9
Question 62. β lactamase is 'enzyme' that is present in
  1.    Cytoplasm
  2.    Cytosol
  3.    Ribosome
  4.    Periplasma
 Discuss Question
Answer: Option D. -> Periplasma
Answer: (d).Periplasma
Question 63. Attachment of 'staphylococci' to 'mucosal' cells is mediated by
  1.    Sulphuric acid
  2.    Teichoic acid
  3.    Polysaccharides
  4.    Lipopolysaccharides
 Discuss Question
Answer: Option B. -> Teichoic acid
Answer: (b).Teichoic acid
Question 64. In human tissues, adherence of bacteria, ultimately causes infection to humans, is mediated by the
  1.    Cell wall
  2.    Sugars
  3.    Capsule
  4.    Flagella
 Discuss Question
Answer: Option C. -> Capsule
Answer: (c).Capsule
Question 65. What helps in the heat resistance of endospore?
  1.    calcium-DPA complex
  2.    water
  3.    methylene
  4.    calcium
 Discuss Question
Answer: Option A. -> calcium-DPA complex
Answer: (a).calcium-DPA complex
Question 66. Which of the following methods can be utilized for removing peripheral proteins of the cytoplasmic membrane?
  1.    treatment by detergents
  2.    osmotic shock
  3.    heat application
  4.    destruction of the membrane
 Discuss Question
Answer: Option B. -> osmotic shock
Answer: (b).osmotic shock
Question 67. Which of the following are true for cytoplasmic membrane?
  1.    hydrophilic barrier
  2.    hydrophobic barrier
  3.    site of generation of protonmotive force
  4.    hydrophobic barrier and site of generation of protonmotive force
 Discuss Question
Answer: Option D. -> hydrophobic barrier and site of generation of protonmotive force
Answer: (d).hydrophobic barrier and site of generation of protonmotive force
Question 68. Cysts also have high heat resistance like endospores.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 69. The organisms which can use reduced inorganic compounds as electron donors are known as _________
  1.    chemotrophs
  2.    organotrophs
  3.    lithotrophs
  4.    phototrophs
 Discuss Question
Answer: Option C. -> lithotrophs
Answer: (c).lithotrophs
Question 70. Which of the following is analogous to mesosomes of bacteria?
  1.    Mitochondria of eukaryotes
  2.    Golgi apparatus of eukaryotes
  3.    Lysosomes of eukaryotes
  4.    None of these
 Discuss Question
Answer: Option A. -> Mitochondria of eukaryotes
Answer: (a).Mitochondria of eukaryotes

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