PG NEET Microbiology MCQs 6– Sterilization and Disinfection

  1. Blood agar is an example of:
    1. Enriched media
    2. Simple media
    3. Enrichment media
    4. Selective media
      1. Ans(1)
  2. Following transmit drug resistance except
    1. RTF
    2. Plasmids
    3. HFR
    4. Chromosome
      1. Ans(3)
  3. The following is a selective medium
    1. Peptone water
    2. LJ medium
    3. Selenite F both
    4. Chocolate agar
      1. Ans(2)
  4. Drug resistance is not transmitted by:
    1. HFR
    2. Transposons
    3. Plasmids
    4. Chromosome
      1. Ans(1)
  5. The following is an enrichment media
    1. Blood agar
    2. Thayer – Martin media
    3. Wilson & Blair media
    4. Tetrathionate broth
      1. Ans(4)
  6. Conjugation does not involve:
    1. Bacteriophages
    2. HFR
    3. FR
    4. Plasmids
      1. Ans(1)
  7. Fastidious organisms are grown by
    1. Prolonged incubation time
    2. Subcultures
    3. Enriched
    4. All the above
      1. Ans(3)
  8. Jumping gene is:
    1. Transposon
    2. Episome
    3. Cosmid
    4. Plasmid
      1. Ans(1)
  9. McConkey medium is a
    1. Simple medium
    2. Selective medium
    3. Different medium
    4. Enrichment medium
      1. Ans(3)
  10. Microbial killing below MIC is known as:
    1. Adverse effect
    2. Post-antibiotic
    3. Both
    4. None
      1. Ans(2)
  11. Indicator used in MacConkey’s medium
    1. Methylene blue
    2. Methyl red
    3. Neutral red
    4. Bromothymol blue
      1. Ans(3)
  12. Transfer of some chromosomal material from one bacteria to other can occur via:
    1. F factor
    2. R factor
    3. Transfer factor
    4. All of the above
      1. Ans(4)
  13. Triple iron sugar medium contains all except
    1. Lactose
    2. Sucrose
    3. Glucose
    4. maltose
      1. Ans(4)
  14. R – factor in bacteria is transferred by
    1. Transduction
    2. Transformation
    3. Conjugation
    4. Vertical transmission
      1. Ans(2)
  15. Routinely blood culture should be incubated for
    1. 2 days
    2. 5 days
    3. 7 days
    4. 10 days
      1. Ans(3)
  16. Multiple drug resistance is spread by:
    1. Transformation
    2. Transduction
    3. Mutation
    4. Conjugation
      1. Ans(4)
  17. Plasmid is
    1. Extra-chromosomal
    2. Chromosomal
    3. Mesosome
    4. Ribosome
      1. Ans(1)
  18. Viral DNA is integrated into Bacterial DNA in:
    1. Transduction
    2. Lysogenic conversion
    3. Transformation
    4. Conjugation
      1. Ans(2)
  19. Plasmids are involved in
    1. Cellular respiration
    2. Cellular metabolism
    3. Cellular mobility
    4. Gene transfer
      1. Ans(4)
  20. Prophage is defined as:
    1. Insertion of viral nucleic acid into bacteria by bacteriophage
    2. First cycle of division of bacterial nucleic acid
    3. Second cycle of division of bacterial nucleic acid
    4. Integrated temperate bacteriophage genome into bacterial chromosome
      1. Ans(1)
  21. Penicillin resistance in staphylococci is acquired by
    1. Transformation
    2. Transduction
    3. Lysogenic conversion
    4. conjugation
      1. Ans(2)
  22. ETO sterilized products require________ hours of aeration:
    1. 12
    2. 10
    3. 8
    4. no need for aeration
      1. Ans(3)
  23. Transfer of plasmid from one bacteria to other is called
    1. Transformation
    2. Transduction
    3. Lysogenic conversion
    4. conjugation
      1. Ans(4)
  24. Ethylene oxide is a highly toxic agent, which destroys microorganism by a process  called
    1. Cavitation
    2. oxidation
    3. osmosis
    4. Alkylation
      1. Ans(4)
  25. R-factor in bacteria is transferred by
    1. Transduction
    2.  Transformation
    3. Lysogenic conversion
    4. conjugation
      1. Ans(3)
  26. Which of the following sterilization process useshydrogen peroxide and radio-frequency emissions:
    1. Cold sterilization
    2. Hydroclave
    3. Gas plasma sterilization
    4. Endoclens
      1. Ans(3)
  27. Phage mediated DNA transfer is called
    1. Transduction
    2. Transformation
    3. conjugation
    4. Conversion
      1. Ans(1)
  28. Gas plasma is not compatible with
    1. Heat sensitive devices
    2. Items with lumens
    3. paper products
    4. Both B & C
      1. Ans(3)
  29. Drug resistance in Mycobacterium tuberculosis is due to
    1. Transformation
    2. Transduction
    3. conjugation
    4. Chromosomal mutation
      1. Ans(4)
  30. Plasma sterilization accuracy is assessed by using?
    1. Bacillus subtilis
    2. Bacillus stearothermophilus
    3. Staphylococcus aureus
    4. Clostridium tetani
      1. Ans(2)
  31. Example of transfer of drug resistance by conjugation
    1.  Staphylococci to rifampicin
    2. Pneumococcus to penicillin G
    3. M tuberculosis to anti-tubercular drugs
    4. E coli to streptomycin
      1. Ans(4)
  32. Soaps are
    1. Anionic surface acting agents
    2. Cationic surface acting agents
    3. Neutral surface acting agents
    4. Phenols
      1. Ans(1)
  33. Most commonly used method for testing antibiotic susceptibility of bacteria
    1. Kirby – Bauer disc diffusion method
    2. Epsilmoter test
    3. Broth dilution method
    4. Stroke disc diffusion method
      1. Ans(1)
  34. gas vapor sterilization all except
    1. Ethylene oxide
    2. Hydrogen peroxide
    3. Formaldehyde
    4. Glutaraldehyde
      1. Ans(4)
  35. Culture medium used in antibiotic sensitivity tests
    1. New York agar
    2. Hektoen agar
    3. Mueller – Hinoto agar
    4. Salt milk agar
      1. Ans(3)
  36. All are true regarding disinfectants except
    1. Glutaraldehyde is sporicidal
    2. Hypochlorites are virucidal
    3. Ethylene oxide is intermediate disinfectant
    4. Phenol acts in the presence of organic matter
      1. Ans(3)
  37. All of the following are methods of Antibiotic sensitivity testing except
    1. E test
    2. Kirby – Bauer method
    3. Culture dilution method
    4. Broth dilution method
      1. Ans(3)
  38. Agent used for sterilization except
    1. Ethylene oxide
    2. Percholic acid
    3. 2% Glutaraldehyde
    4. Formaldehyde with
      1. Ans(4)
  39. Not true about Bacteriocins
    1. Antibiotic like substance
    2. Produced by coliform bacteria
    3. Active against bacteriophages
    4. Determined by the Col factor
      1. Ans(3)
  40. The most widely used effective economical and reliable method of sterilization used in the health care setting is:
    1. Gas plasma
    2. Ethylene oxide
    3. Peracetic acid
    4. Steam
      1. Ans(4)
  41. True statement regarding transferable drug resistance
    1. rResistance to one drug at a time
    2. Low degree of resistance
    3. can be overcome by high drug does
    4. Drug combinations cannot prevent resistance
      1. Ans(4)
  42. Multiple drug resistance is attained by
    1. Transduction
    2. Transformation
    3. Conjugation
    4. Mutation
      1. Ans(3)
  43. ‘Disinfectant’ kills the following
    1. All microorganisms
    2. Pathogenic microorganisms
    3. Viruses and fungi
    4. Non -pathogenic microorganisms
      1. Ans(2)
  44. Anticoagulant most commonly used when blood is sent for blood culture
    1. Sodium citrate
    2. EDTA
    3. Heparin
    4. Sodium polyanethol sulfonate
      1. Ans(4)
  45. Phenol coefficient indicates
    1. Efficiency of a disinfectant
    2. dilution of a disinfectant
    3. the purity of a disinfectant
    4. the quantity of a disinfectant
      1. Ans(1)
  46. Nosocomial infection develops within _____________of admission to a hospital
    1. <12 hours
    2. 12-24 hours
    3. 24 -48 hours
    4. 48-72 hours
      1. Ans(4)
  47. resazurin test is done to:
    1. Detect bacterial contamination in raw milk
    2. Estimate water content in milk
    3. detect chemical impurities in the food
    4. Detect pollution in the air
      1. Ans(1)
  48. Most common Nosocomial infection
    1. Pneumonia
    2. Urinary tract infection
    3. Surgical wound infection
    4. Nephritis
      1. Ans(2)
  49. According to Spaulding Classification System of Sterilization following is true
    1. “Non – critical devices” come into contact with intact skin
    2. Semicritical equipment need low- level sterilization
    3. “Semi-critical  devices” come into contact with non – sterile mucous membranes or non – intact skin
    4. Cardiac catheter is critical equipment
      1. Ans(2)
  50. Most common route of nosocomial infection
    1. Droplet transmission
    2. Direct contact
    3. Indirect contact
    4. Vehicle transmission
      1. Ans(2)

Take the quiz to complete the lesson. For taking the quiz please enroll as a member of this site and join our gold course. Click here

All attempts have been made to give the right answers in case anything wrong please inform us through our comments section also refer standard textbooks

Free WordPress Themes, Free Android Games