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MCQs

Total Questions : 204 | Page 16 of 21 pages
Question 151. By which of the following means antifungal chemotherapeutic agents may affect fungi?
  1.    Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis
  2.    Interfere with normal nucleic acid synthesis
  3.    Interfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic membrane as well as the function of several membrane-bound enzymes like those involved in nutrient transport and chitin synthesis
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 152. Which of the following is a drug that interferes with the process of DNA production in the virus that causes genital herpes?
  1.    Acyclovir
  2.    Erythromycin
  3.    Vancomycin
  4.    Amantadine
 Discuss Question
Answer: Option A. -> Acyclovir
Question 153. Which of the antibiotic is not used as a food preservative ?
  1.    Nisin
  2.    Pimaricin
  3.    Tylosin
  4.    β-lactam antibiotic
 Discuss Question
Answer: Option D. -> β-lactam antibiotic
Question 154. Which antibiotic has a beta-lactam ring?
  1.    Penicillin
  2.    Tetracycline
  3.    Streptomycin
  4.    Cephalosporin
 Discuss Question
Answer: Option A. -> Penicillin
Question 155. Cycloserine inhibits
  1.    Both (a) and (b)
  2.    alanine racemase
  3.    D-alanyl - D-alanine synthetase
  4.    amidase
 Discuss Question
Answer: Option A. -> Both (a) and (b)
Question 156. The most selective antibiotics are those that interfere with the synthesis of
  1.    bacterial DNA
  2.    bacterial RNA
  3.    bacterial cell walls
  4.    bacterial plasma membrane
 Discuss Question
Answer: Option C. -> bacterial cell walls
Question 157. Chemotherapeutic agents must
  1.    prevent/destroy the activity of a parasite
  2.    leave unaltered the host's natural defense mechanisms
  3.    All of these
  4.    be able to come in contact with the parasite by penetrating the cells
 Discuss Question
Answer: Option C. -> All of these
Question 158. By which of the following means antifungal chemotherapeutic agents may affect fungi?
  1.    Interfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic membrane as well as the function of several membrane-bound enzymes like those involved in nutrient transport and chitin synthesis
  2.    Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis
  3.    Interfere with normal nucleic acid synthesis
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 159. Interference mechanism of ciprofloxacin and norfloxacin is due to their action on
  1.    cell wall synthesis
  2.    cell membrane function
  3.    protein synthesis
  4.    DNA function
 Discuss Question
Answer: Option D. -> DNA function
Question 160. Which of the following methods would be most appropriate for sterilizing an antibiotic solution?
  1.    Dry heat sterilization
  2.    Microfiltration
  3.    Desiccation
  4.    Autoclaving
 Discuss Question
Answer: Option B. -> Microfiltration

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