Otázky s chybnou odpovědí, č.j. 7922486
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TEST:autumn12  Varianta:9         Tisknuto:17/12/2019
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  4. ( 23.orig.) E. coli-labile toxin and cholera toxin
 3) + ADP-ribosylate a G-protein, which as a result constantly activates adenylate cyclase. (nezaškrtl-a)
 4) - ADP-ribosylate cAMP, which as a result cannot activate protein kinase A. (zaškrtl-a)
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  8. ( 11.orig.) Complement component C3b:
 1) + Opsonizes bacteria. (nezaškrtl-a)
 3) - Is an anaphylatoxin. (zaškrtl-a)
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 13. (  6.orig.) Beta-lactam antibiotics are correctly described as all of the following EXCEPT
 1) - those having a low toxicity (zaškrtl-a)
 2) + potent antimycotic agents (nezaškrtl-a)
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 20. ( 17.orig.) Which type of genetic exchange in bacteria is susceptible to the activity of deoxyribonuclease?
 1) - Transduction (zaškrtl-a)
 2) - Transfection (zaškrtl-a)
 4) - Conjugation (zaškrtl-a)
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 22. (  8.orig.) MMR vaccine for the prevention of virus infections protects against:
 2) + rubella virus (nezaškrtl-a)
 3) - mononucleosis virus (zaškrtl-a)
 4) + measles virus (nezaškrtl-a)
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 31. (  9.orig.) Bacterial H antigen is derived from
 3) + flagellin (nezaškrtl-a)
 4) - endotoxin (zaškrtl-a)
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 34. ( 22.orig.) Fresh cell-culture media and media that a bacterial strain was grown in are injected separately into different mice. Only the mice that received the bacterial-exposed media become ill, but this effect is negated by first treating the media with a proteinase. This finding suggests that
 1) - the bacteria secrete a non-protein exotoxin. (zaškrtl-a)
 3) + the bacteria secrete a protein exotoxin. (nezaškrtl-a)
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 38. ( 14.orig.) Which of the following is able to activate complement?
 1) - IgA (zaškrtl-a)
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 43. ( 25.orig.) Biochemical mechanisms occurring in bacterial resistance include:
 2) + Producing enzymes that break down antibiotic. (nezaškrtl-a)
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 50. ( 13.orig.) A living microbe with reduced virulence that is used for vaccination is considered:
 2) + Attenuated (nezaškrtl-a)
 4) - A toxoid (zaškrtl-a)
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 51. (  4.orig.) All of the following compounds are found in the cell wall of certain bacteria EXCEPT
 2) + chitin (nezaškrtl-a)
 3) - N-acetylglucosamine (zaškrtl-a)
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 57. (  2.orig.) Periplasmic space of gram-negative bacteria
 2) - is a spece between the peptigoglycan layer and the cytoplasmic membrane (zaškrtl-a)
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 59. (  7.orig.) Which is true for endotoxins? 
 1) - Highly toxic and fatal in microgram quantities (zaškrtl-a)
 3) - Toxoids are used to immunize (zaškrtl-a)
 4) + Found only in Gram-negative bacteria (nezaškrtl-a)
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 65. ( 18.orig.) You have recently identified a new toxin. It is produced by a gram-negative bacterium. It is composed mostly of protein, has high toxicity, and is not heat stable. You also discover that it targets liver cells. Based on these characteristics, how would you classify this toxin?
 1) - superantigen (zaškrtl-a)
 3) + exotoxin (nezaškrtl-a)
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TEST:autumn2  Varianta:9         Tisknuto:17/12/2019
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  2. ( 27.orig.) Causes of bacterial meningitis in neonates include:
 2) + Streptococcus pneumoniae(nezaškrtl-a)
 4) + Escherichia coli(nezaškrtl-a)
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  3. ( 11.orig.) Staphylococcal food poisoning usually manifests itself following ingestion of contaminated food after
 2) - 12-18 hours (zaškrtl-a)
 4) + 2-6 hours (nezaškrtl-a)
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  6. (  4.orig.) Puerperal fever is a streptococcal infection of the
 2) + uterus (nezaškrtl-a)
 4) - heart (zaškrtl-a)
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 10. ( 25.orig.) A 8 year old girl was playing in a slowly moving stream when she cut her foot on a sharp object. Three days later she was brought to the emergency room of Tribhuvan University Teaching Hospital hospital because of pain and swelling at the site of the wound and drainage of pus from it. The most likely cause of the infection is
 2) + Aeromonas hydrophila(nezaškrtl-a)
 3) + Vibrio vulnificus(nezaškrtl-a)
 4) - Salmonella typhimurium(zaškrtl-a)
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 11. ( 26.orig.) All of the following statements regarding the epidemiology of infections caused by Yersinia enterocolitica are correct EXCEPT:
 1) - Infection is more prevalent in persons with histocompatibility antigen HLA-B27 (zaškrtl-a)
 2) + Person to person spread is quite common (nezaškrtl-a)
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 14. (  6.orig.) A positive Mantoux test indicates an area of induration of
 1) + 10 mm or more in diameter (nezaškrtl-a)
 3) - 4-9 mm in diameter (zaškrtl-a)
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 15. ( 31.orig.) Ophthalmia neonatorum is caused by: 
 3) - Escherichia coli(zaškrtl-a)
 4) + Neisseria gonorrhoeae(nezaškrtl-a)
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 18. ( 14.orig.) Which is the most common form of anthrax? 
 3) + Cutaneous anthrax (nezaškrtl-a)
 4) - Injection anthrax (zaškrtl-a)
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 19. ( 20.orig.) Bacteria commonly acquired from animals include
 1) + Listeria monocytogenes(nezaškrtl-a)
 2) - Legionella pneumophila(zaškrtl-a)
 3) - Corynebacterium diphtheriae(zaškrtl-a)
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 23. ( 13.orig.) Food most often associated with emetic type of food poisoning caused by Bacillus cereus, is
 1) - Milk (zaškrtl-a)
 3) + Rice (nezaškrtl-a)
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 26. ( 34.orig.) The antistreptolysin O titre is raised in infections caused by
 1) + Streptococcus pyogenes(nezaškrtl-a)
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 28. ( 21.orig.) Mark correct answer(s): 
 4) + Listeria monocytogenes is found in very high numbers in the amniotic fluid of congenitally infected infants. (nezaškrtl-a)
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 30. ( 16.orig.) Which of the following can be caused by either a bacterial or viral infection?
 2) - anthrax (zaškrtl-a)
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 33. ( 22.orig.) Neisseria meningitidis is a serious cause of bacterial infection which
 1) + Can result in septicaemia (nezaškrtl-a)
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 35. ( 35.orig.) Pseudomonas aeruginosa can be diagnosed from the pigment, known as
 2) + Pyocyanin (nezaškrtl-a)
 4) + Pyomelanin (nezaškrtl-a)
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 36. (  3.orig.) Streptococus pyogenes comprises which Lancefield group?
 1) + A (nezaškrtl-a)
 2) - B (zaškrtl-a)
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 39. ( 30.orig.) Which of the following statements is/are true about Haemophilus influenzae b (Hib) vaccine:
 1) + Made from capsular polysaccharide that has been extracted from cultures of Hib bacteria (nezaškrtl-a)
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 49. (  1.orig.) Regarding the effect of benzylpenicillin (penicillin G) on bacteria, which one of the following organisms is LEAST likely to be resistant?
 1) + Streptococcus pyogenes(nezaškrtl-a)
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 53. (  7.orig.) Mycobacterium tuberculosis bacteria avoid innate immunity by
 3) - Living in an immuno-privileged tissue site (zaškrtl-a)
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 54. ( 28.orig.) Neisseria meningitis
 3) + Can be is spread through the exchange of saliva and chewing on toys. (nezaškrtl-a)
 4) + It exists as normal flora in the nasopharynx of up to 5-15% of adults. (nezaškrtl-a)
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 55. ( 33.orig.) Which type of Escherichia coli infection can be severe with life-threatening consequences such as hemolytic uremic syndrome? 
 1) - ETEC (zaškrtl-a)
 4) + EHEC (nezaškrtl-a)
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 56. (  2.orig.) Which of the following microorganism causes lesions in the form of abscesses?
 2) - Bacillus anthracis(zaškrtl-a)
 4) + Staphylococcus aureus(nezaškrtl-a)
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 61. (  8.orig.) Acid-fast organisms such as Mycobacterium tuberculosis resist decolorization by an acid-alcohol wash because of the high concentration of __________ in their cell walls. 
 2) + Lipids (nezaškrtl-a)
 4) - Proteins (zaškrtl-a)
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 64. ( 37.orig.) The substance(s) which can be produced by strains of Pseudomonas aeruginosa is/are
 3) + Exotoxins A and S (nezaškrtl-a)
 4) + Elastase (nezaškrtl-a)