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MCQs

Total Questions : 204 | Page 14 of 21 pages
Question 131. To produce penicillin, the main fermentable source in the culture is
  1.    glucose
  2.    lactose
  3.    sulphate
  4.    sugars
 Discuss Question
Answer: Option B. -> lactose
Answer: (b).lactose
Question 132. Structurally all penicillins have only beta-lactam present in them.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 133. Benzylpenicillin is the chemical name for which of the following penicillin?
  1.    Penicillin G
  2.    Penicillin V
  3.    Penicillin F
  4.    Phenethicilin
 Discuss Question
Answer: Option A. -> Penicillin G
Answer: (a).Penicillin G
Question 134. Which of the following does not affect the activity of penicillin?
  1.    bile
  2.    hydrochloric acid
  3.    cysteine
  4.    sodium hydroxide
 Discuss Question
Answer: Option A. -> bile
Answer: (a).bile
Question 135. The crystalline sodium or potassium salts are slightly soluble in ___________
  1.    ether
  2.    dioxane
  3.    water
  4.    chloroform
 Discuss Question
Answer: Option D. -> chloroform
Answer: (d).chloroform
Question 136. Ampicillin is a bactericidal antibiotic.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 137. Which of the following inhibits protein synthesis by combining with the 50S subunit ribosome?
  1.    Streptomycin
  2.    Tetracycline
  3.    Chloramphenicol
  4.    Penicillin
 Discuss Question
Answer: Option C. -> Chloramphenicol
Answer: (c).Chloramphenicol
Question 138. Which of the following is the most accurate method for microbial assay of antibiotics?
  1.    Physical assay
  2.    Chemical assay
  3.    Biological assay
  4.    Chemical and biological assay
 Discuss Question
Answer: Option B. -> Chemical assay
Answer: (b).Chemical assay
Question 139. Zone of inhibition is observed in tube-dilution method.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 140. Tyrocidines are more effective against ___________________
  1.    Gram-positive organisms
  2.    Gram-negative organisms
  3.    Mycoplasmas
  4.    Spirochetes
 Discuss Question
Answer: Option A. -> Gram-positive organisms
Answer: (a).Gram-positive organisms

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