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MCQs

Total Questions : 304 | Page 9 of 31 pages
Question 81. For Clostridium botulinum type A toxin, 1 MLD for a mouse is ____________
  1.    2.5 X 10^-5 µg
  2.    4 X 10^-5 µg
  3.    6 X 10^-2 µg
  4.    5 µg
 Discuss Question
Answer: Option A. -> 2.5 X 10^-5 µg
Answer: (a).2.5 X 10^-5 µg
Question 82. What is the chemical nature of endotoxins?
  1.    protein
  2.    polysaccharide
  3.    lipopolysaccharide
  4.    lipid
 Discuss Question
Answer: Option C. -> lipopolysaccharide
Answer: (c).lipopolysaccharide
Question 83. Which of the following is a plasmid-mediated toxin?
  1.    diphtheria toxin
  2.    botulism toxin
  3.    tetanus toxin
  4.    food-poisoning toxin
 Discuss Question
Answer: Option D. -> food-poisoning toxin
Answer: (d).food-poisoning toxin
Question 84. Which type of toxin is tetanus toxin?
  1.    enterotoxin
  2.    neurotoxin
  3.    cytotoxin
  4.    endotoxin
 Discuss Question
Answer: Option B. -> neurotoxin
Answer: (b).neurotoxin
Question 85. Exotoxins are heat-labile in nature.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 86. The B region of diphtheria toxin has the enzymatic activity.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 87. How many B subunits are present in cholera toxin?
  1.    1
  2.    2
  3.    3
  4.    5
 Discuss Question
Answer: Option D. -> 5
Answer: (d).5
Question 88. Which toxin causes paralysis of muscles?
  1.    Diphtheria toxin
  2.    Botulinum toxin
  3.    Tetanus toxin
  4.    Cholera toxin
 Discuss Question
Answer: Option B. -> Botulinum toxin
Answer: (b).Botulinum toxin
Question 89. Which amino acid is an inhibitory transmitter?
  1.    alanine
  2.    tyrosine
  3.    glycine
  4.    phenylalanine
 Discuss Question
Answer: Option C. -> glycine
Answer: (c).glycine
Question 90. Which of the following statement is wrong regarding the effects of cholera toxin?
  1.    loss of fluid from the body
  2.    pH of blood remains constant
  3.    hemoconcentration
  4.    bicarbonate ions are lost from blood
 Discuss Question
Answer: Option B. -> pH of blood remains constant
Answer: (b).pH of blood remains constant

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