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MCQs

Total Questions : 204 | Page 17 of 21 pages
Question 161. Novobiocin can be used against
  1.    Haemophilus
  2.    gram +ve Staphylococci
  3.    gram -ve Meningococci & Gonococci
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 162. When using alcohol as an antiseptic, which concentration is considered most effective?
  1.    50%
  2.    25%
  3.    95%
  4.    70%
 Discuss Question
Answer: Option D. -> 70%
Question 163. Which of the following is used only in life-threatening situations when no other drug is adequate?
  1.    Streptomycin
  2.    Chloramphenicol
  3.    Tetracycline
  4.    Penicillin
 Discuss Question
Answer: Option B. -> Chloramphenicol
Question 164. Fluoroquinolones are antibiotics which inhibit
  1.    RNA polymerase
  2.    DNA polymerase
  3.    Cross-linking of peptidoglycan
  4.    DNA gyrase
 Discuss Question
Answer: Option D. -> DNA gyrase
Question 165. Who developed the concept of specific toxicity?
  1.    Watson
  2.    Ehrlich
  3.    Fleming
  4.    Pasteur
 Discuss Question
Answer: Option B. -> Ehrlich
Question 166. Which of the following drugs involves modification of the drug by enzymatic modification or degradation of its active element to alter its/their resistance?
  1.    Pencillins
  2.    Choloramphenicol
  3.    Aminoglyosides
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 167. Which of the following group is not the carbohydrate containing antibiotic?
  1.    Vancomycin & Moenomycin
  2.    Erythromycin & candicidin
  3.    Everninomycin & Nogirimycin
  4.    Streptomycin & Streptothricin
 Discuss Question
Answer: Option B. -> Erythromycin & candicidin
Question 168. Most antibiotics are isolated from
  1.    soil microorganisms
  2.    plants
  3.    viruses
  4.    aquatic microorganisms
 Discuss Question
Answer: Option A. -> soil microorganisms
Question 169. The penicillin stable in gastric acid and suitable for oral administration is
  1.    closacillin
  2.    methicillin
  3.    pencillin-G
  4.    carbenicillin
 Discuss Question
Answer: Option A. -> closacillin
Question 170. The susceptibility of a microorganism to antibiotics and other chemotherapeutic agents can be determined by using
  1.    none of these
  2.    paper disk plate
  3.    tube dilution technique
  4.    both (a) and (b)
 Discuss Question
Answer: Option D. -> both (a) and (b)

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