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MCQs

Total Questions : 204 | Page 20 of 21 pages
Question 191. Which of the following protein synthesis mechanisms may be affected by particular drugs?
  1.    Aminoacyl-tRNA binding
  2.    All of these
  3.    Peptide bond formation
  4.    mRNA translocation
 Discuss Question
Answer: Option B. -> All of these
Question 192. The antibiotics not having good activity against Enterobacteriaceae is
  1.    ciprofloxacin
  2.    cefoxitin
  3.    trimethoprim-sulphamethoxazole
  4.    clindamycin
 Discuss Question
Answer: Option D. -> clindamycin
Question 193. Quinones and related antibiotics are
  1.    all of these
  2.    mitomycin
  3.    tetracyclines
  4.    actinorhodin
 Discuss Question
Answer: Option A. -> all of these
Question 194. Both penicillin and fluoroquinolones
  1.    inhibit the cross-linking of peptidoglycan
  2.    are inactivated by β-lactamase
  3.    bind to and inactivate a bacterial protein
  4.    must be transported into the cytoplasm in order to act
 Discuss Question
Answer: Option C. -> bind to and inactivate a bacterial protein
Question 195. A broad-spectrum antibiotic such as chloramphenicol is one that
  1.    kills numerous types of microbes
  2.    kills all microorganisms
  3.    kills both Gram positive and Gram negative bacteria
  4.    kills all bacteria
 Discuss Question
Answer: Option A. -> kills numerous types of microbes
Question 196. Vancomycin inhibits peptidoglycan synthesis by binding
  1.    amidase
  2.    D-alanyl - D-alanine
  3.    D-alanyl - D-alanine synthetase
  4.    alanine racemase
 Discuss Question
Answer: Option B. -> D-alanyl - D-alanine
Question 197. Cephalosporins and Penicillins interfere with which of the following?
  1.    Protein synthesis
  2.    DNA function
  3.    Cell wall synthesis
  4.    Cell membrane function
 Discuss Question
Answer: Option C. -> Cell wall synthesis
Question 198. Bacterial cells susceptible to penicillium can be protected from destruction if the medium in which they are exposed is of
  1.    high surface tension
  2.    high osmotic pressure
  3.    moderate osmotic pressure
  4.    low osmotic pressure
 Discuss Question
Answer: Option B. -> high osmotic pressure
Question 199. Nystatin is a drug used for treatment of diseases caused by
  1.    gram positive bacterium
  2.    protozoan
  3.    yeast
  4.    gram negative bacterium
 Discuss Question
Answer: Option C. -> yeast
Question 200. Which is not an amino acid and peptide antibiotic?
  1.    Actinomycin
  2.    Penicillin
  3.    Bacitracin
  4.    Tetranactin
 Discuss Question
Answer: Option D. -> Tetranactin

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