MCQOPTIONS
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MCQOPTIONS
This section includes 285 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The toxins produced by bacteria |
| A. | kill viruses |
| B. | encourage bacterial reproduction |
| C. | interfere with physiological processes in the body |
| D. | all of the above |
| Answer» D. all of the above | |
| 52. |
LT toxin is produced by _____________ |
| A. | S. aureus |
| B. | E.coli |
| C. | B. anthracis |
| D. | C. perfringens |
| Answer» C. B. anthracis | |
| 53. |
'Rous sarcoma' virus is |
| A. | DNA Tumor virus |
| B. | RNA Tumor virus |
| C. | Enveloped viruses |
| D. | Naked viruses |
| Answer» C. Enveloped viruses | |
| 54. |
At what pH values are the rhinoviruses destroyed? |
| A. | 7 |
| B. | 12-13 |
| C. | 1-4 |
| D. | 5-7 |
| Answer» D. 5-7 | |
| 55. |
'HDV' belongs to family |
| A. | Piconavirus |
| B. | Hepdnavirus |
| C. | Flavivirus |
| D. | Deltavirus |
| Answer» E. | |
| 56. |
Patients with botulism are treated with monovalent antitoxin. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 57. |
A common disease in infants that is characterized by transient rash and high fever is caused by |
| A. | Hendra virus |
| B. | Hantavirus |
| C. | Human herpesvirus 6 |
| D. | Herpesvirus |
| Answer» D. Herpesvirus | |
| 58. |
'Alphaviruses' and 'rubiviruses' are families of |
| A. | Togaviruses |
| B. | Flaviviruses |
| C. | Bunyaviruses |
| D. | Echovirus |
| Answer» B. Flaviviruses | |
| 59. |
All, herpesviruses' have |
| A. | Helical structure |
| B. | Icosahedral core |
| C. | Spiral shape |
| D. | Linear Shape |
| Answer» C. Spiral shape | |
| 60. |
__________________ is a hyaluronidase that may aid invasiveness of C.perfringens. |
| A. | alpha toxin |
| B. | theta toxin |
| C. | µ toxin |
| D. | √ toxin |
| Answer» D. √ toxin | |
| 61. |
'virion' lacks |
| A. | Ligase |
| B. | Polymerase |
| C. | Transferase |
| D. | Protease |
| Answer» C. Transferase | |
| 62. |
Which of the following disease is caused by the pathogen directly infecting the lymphatic system? |
| A. | meningitis |
| B. | typhoid fever |
| C. | renal failure |
| D. | anemia |
| Answer» C. renal failure | |
| 63. |
A gene, that may cause of initiation of cancer growth, is known as |
| A. | Hepatitis causing gene |
| B. | Mutated gene |
| C. | Oncogene |
| D. | Carcinogen |
| Answer» D. Carcinogen | |
| 64. |
'Marburg' virus was first identified as a human pathogen in |
| A. | 1960 |
| B. | 1967 |
| C. | 1968 |
| D. | 1987 |
| Answer» C. 1968 | |
| 65. |
Which of the following disease is not caused by microbial protein toxin? |
| A. | Botulism |
| B. | Diphtheria |
| C. | Shigella dysentery |
| D. | Tuberculosis |
| Answer» E. | |
| 66. |
Exotoxins are heat-labile in nature. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 67. |
What is approximate size of Orthomyxoviruses ? |
| A. | 100 nm |
| B. | 110 nm |
| C. | 120 nm |
| D. | 130 nm |
| Answer» C. 120 nm | |
| 68. |
Eastern equine encephalitis is more fatal than western equine encephalitis. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 69. |
Leishmania organism are transmitted to humans by ______________ |
| A. | sandflies |
| B. | tsetse flies |
| C. | mosquitoes |
| D. | bugs |
| Answer» B. tsetse flies | |
| 70. |
An important host defense of human beings is a dense resident microbiota associated with |
| A. | lungs |
| B. | bladder |
| C. | uterus |
| D. | vagina |
| Answer» E. | |
| 71. |
Cache valley virus was first time isolated, in |
| A. | 1948 |
| B. | 1955 |
| C. | 1956 |
| D. | 1958 |
| Answer» D. 1958 | |
| 72. |
Which strain of adenoviruses can cause cancer? |
| A. | Subgroup I |
| B. | Subgroup II |
| C. | Subgroup III |
| D. | Subgroup IV |
| Answer» E. | |
| 73. |
Hylauronidase enzyme is is produced by which of the following organism? |
| A. | C. perfringens |
| B. | S. pyogenes |
| C. | S. aureus |
| D. | Mycoplasma |
| Answer» B. S. pyogenes | |
| 74. |
'Rabies' is condition caused by bite of |
| A. | Flees |
| B. | Ticks |
| C. | Rabid animals |
| D. | Mad cows |
| Answer» D. Mad cows | |
| 75. |
Mode of transmission for 'dengue' is |
| A. | Monkeys |
| B. | Haemagogus mosquito |
| C. | Ades mosquito |
| D. | Pigs |
| Answer» D. Pigs | |
| 76. |
What is the shape of the nucleoid of poxviruses? |
| A. | circular |
| B. | brick-shaped |
| C. | irregular |
| D. | dumbbell-shped |
| Answer» E. | |
| 77. |
Hendra virus is a human pathogen that is identified in |
| A. | 1994 |
| B. | 1991 |
| C. | 1995 |
| D. | 1998 |
| Answer» B. 1991 | |
| 78. |
Thayer-Martin medium is used for isolation of organism for which disease? |
| A. | diphtheria |
| B. | meningococcal meningitis |
| C. | gonorrhea |
| D. | gastroenteritis |
| Answer» D. gastroenteritis | |
| 79. |
Lactoferrin helps to protect against pathogens by |
| A. | sequestering Iron |
| B. | blocking sebum production |
| C. | lowering the pH |
| D. | facilitating the growth of normal flora |
| Answer» B. blocking sebum production | |
| 80. |
The "A" subunit of diphtheria toxin |
| A. | binds host cell receptors found on heart cells |
| B. | cause ADP ribosylation of a factor involved in protein synthesis |
| C. | forms cAMP that leads to fluid accumulation |
| D. | lysis macrophages with the release of cytokines |
| Answer» C. forms cAMP that leads to fluid accumulation | |
| 81. |
Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause |
| A. | ADP ribosylation of adenylate cyclase that stops production of cAMP |
| B. | ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP |
| C. | cleavage of rRNA that results in disruption of ribosome function |
| D. | ADP ribosylation of guanylate cyclase that stimulates production of cGMP |
| Answer» C. cleavage of rRNA that results in disruption of ribosome function | |
| 82. |
Booster immunizations should be given every 10 years. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 83. |
The antibiotic griseofulvin is active against deep mycoses. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 84. |
Which of the following microbe does not belong to Group D enterococci group? |
| A. | S. faecalis |
| B. | S. faecium |
| C. | S. durans |
| D. | S. bovis |
| Answer» E. | |
| 85. |
Recurrent epidemics of 'influenza' is caused by the |
| A. | Influenza A virus |
| B. | Influenza B virus |
| C. | None of These |
| D. | Both a and b |
| Answer» E. | |
| 86. |
Varicella-zoster virus is abbreviated as |
| A. | VZU |
| B. | VVU |
| C. | ZUV |
| D. | ZZV |
| Answer» B. VVU | |
| 87. |
Which amino acid is an inhibitory transmitter? |
| A. | alanine |
| B. | tyrosine |
| C. | glycine |
| D. | phenylalanine |
| Answer» D. phenylalanine | |
| 88. |
Virus that is well known in causing 'latent infection' is called as |
| A. | Adenovirus |
| B. | Herpes virus |
| C. | Hepatitis B virus |
| D. | Influenza virus |
| Answer» C. Hepatitis B virus | |
| 89. |
Pontiac fever is a more severe disease than Legionnaires’ disease. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 90. |
What is common in catheters and ventilators? |
| A. | They bypass important defenses of the body |
| B. | Bacteria responsible for associated infections are usually susceptible to antibiotics |
| C. | They predispose patients to viral rather than bacterial infections |
| D. | They are used primarily in neonatal intensive care units |
| Answer» B. Bacteria responsible for associated infections are usually susceptible to antibiotics | |
| 91. |
Smallpox virus is also known as |
| A. | VZU |
| B. | Variola virus |
| C. | Ebola |
| D. | Herpesvirus |
| Answer» C. Ebola | |
| 92. |
Which of the following has the ability to bind antibodies? |
| A. | Coagulase |
| B. | Streptokinase |
| C. | Protein A |
| D. | Hydrogen Peroxide |
| Answer» D. Hydrogen Peroxide | |
| 93. |
'Arthritis' is a disease of |
| A. | Joints |
| B. | Hairs |
| C. | Eyes |
| D. | Nose |
| Answer» B. Hairs | |
| 94. |
Which of the following strains causes acute gastroenteritis in newborns and infants? |
| A. | Enteropathogenic strains |
| B. | Enteroinvasive strains |
| C. | Enterotoxigenic strains |
| D. | Both enteropathogenic and enterotoxigenic |
| Answer» B. Enteroinvasive strains | |
| 95. |
Which of these cytokines is also known under the name cachectin? |
| A. | Interferon gamma |
| B. | Interleukin 2 |
| C. | Tumor necrosis factor (TNF) |
| D. | None of the above |
| Answer» D. None of the above | |
| 96. |
In name of family Reovirus, word 'reo' refer to |
| A. | Respiratory enteric orphans |
| B. | Respiratory |
| C. | Orphans |
| D. | Enteric |
| Answer» B. Respiratory | |
| 97. |
5-fluorocytosine is which type of antibiotic? |
| A. | polyene |
| B. | pyrimidine antimetabolites |
| C. | imidazole |
| D. | antibacterial |
| Answer» C. imidazole | |
| 98. |
Word 'cancer' is derived from Latin word |
| A. | Crab |
| B. | Cow |
| C. | Ticks |
| D. | Bees |
| Answer» B. Cow | |
| 99. |
A condition characterized by swelling in gland is called |
| A. | Measles |
| B. | Mumps |
| C. | Ulcer |
| D. | Influenza |
| Answer» C. Ulcer | |
| 100. |
Crimean-Congo hemorrhagic fever is transmitted by _____________ |
| A. | mosquitoes |
| B. | ticks |
| C. | biting flies |
| D. | rabbits |
| Answer» C. biting flies | |