MCQOPTIONS
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MCQOPTIONS
This section includes 151 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Process of killing or removal of microorganism is known as |
| A. | Sterilization |
| B. | Pasteurization |
| C. | Disinfectant |
| D. | Destruction |
| Answer» D. Destruction | |
| 52. |
A glycopeptide that blocks synthesis of cell wall by disrupting activity of transpeptidase is named as |
| A. | Cephalosporin |
| B. | Vancomycin |
| C. | Monobactams |
| D. | Carbapenems |
| Answer» C. Monobactams | |
| 53. |
Which of the following is not an aminoglycoside antibiotic? |
| A. | Streptomycin |
| B. | Neomycin |
| C. | Kanamycin |
| D. | Cephalosporin |
| Answer» E. | |
| 54. |
Agents that used to stop synthesis of 'proteins' are called |
| A. | Bacteriocins |
| B. | Bactericidal |
| C. | Bacteriostatic |
| D. | Beta lactam |
| Answer» D. Beta lactam | |
| 55. |
The larger the __________ , the better the chemotherapeutic agent. |
| A. | therapeutic index |
| B. | therapeutic dose |
| C. | selective toxicity |
| D. | spectrum |
| Answer» B. therapeutic dose | |
| 56. |
Vaccine used for treatment of 'tuberculosis' is |
| A. | Measles, Mumps, ?Rubella?Vaccine |
| B. | Bacilli Chalmette Guerin |
| C. | MMR |
| D. | Bacteriocins |
| Answer» C. MMR | |
| 57. |
Method which is used primarily for purification of milk is called |
| A. | Sterilization |
| B. | Autoclaving |
| C. | Pasteurization |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 58. |
The nitrofurans differ from the antibiotics in that they |
| A. | do not occur naturally |
| B. | occur naturally |
| C. | are antimicrobial drugs |
| D. | all of these |
| Answer» B. occur naturally | |
| 59. |
'Plague' and 'brucellosis' is condition that is treated by |
| A. | Streptomycin |
| B. | Vancomycin |
| C. | Isoniazid |
| D. | Linezolid |
| Answer» B. Vancomycin | |
| 60. |
Contact lenses and wounds are cleaned by an antiseptic, named as |
| A. | Iodine |
| B. | Tincture |
| C. | Hydrogen peroxide |
| D. | Chlorine |
| Answer» D. Chlorine | |
| 61. |
Sterilization is done by autoclave, consisting exposure to stream, about |
| A. | 120°C |
| B. | 170°C |
| C. | 121°C |
| D. | 116°C |
| Answer» D. 116°C | |
| 62. |
'filters' that are commonly used, known as |
| A. | Nitrocellulose |
| B. | Filtration tubes |
| C. | Sieves |
| D. | Filter paper |
| Answer» B. Filtration tubes | |
| 63. |
In order to help recover from bacterial meningitis, |
| A. | endoscopy shall be done |
| B. | ultrasounds may help |
| C. | x-rays are the treatment |
| D. | antibiotics shall be administered |
| Answer» E. | |
| 64. |
Enzymatic activity of enzyme dihydrofolate reductase is stopped by action of drug, named as |
| A. | Dihydropteroate synthetase |
| B. | Transferase |
| C. | Trimethoprim |
| D. | Flucytosine |
| Answer» D. Flucytosine | |
| 65. |
The antibiotics which affords a broad spectrum of antimicrobial coverage against aerobic and anaerobic bacteria, rickettsiae, chlamydiae, and mycoplasmas is |
| A. | gentamicin |
| B. | tetracycline |
| C. | metronidazole |
| D. | vancomycin |
| Answer» C. metronidazole | |
| 66. |
'isoniazid' have ability to terminate synthesis of |
| A. | Folic acid |
| B. | Mycolic acid |
| C. | Nitric acid |
| D. | Hydrochloric acid |
| Answer» C. Nitric acid | |
| 67. |
Formation of essential components of bacterium cell wall is inhibited by |
| A. | Tetracycline only |
| B. | Erythromycins only |
| C. | Penicillin |
| D. | Tetracycline and Erythromycins |
| Answer» E. | |
| 68. |
The antibiotics not clinically useful for Pseudomonas aeruginosa infection is |
| A. | aminoglycosides |
| B. | ceftazidime |
| C. | piperacillin |
| D. | trimethoprim-sulphamethoxazole |
| Answer» E. | |
| 69. |
A polyene, named as nystatin has |
| A. | Antiviral activity |
| B. | Antibacterial activity |
| C. | Antifungal activity |
| D. | Neutral |
| Answer» D. Neutral | |
| 70. |
Death can result due to meningitis caused by |
| A. | virus |
| B. | bacteria |
| C. | fungi |
| D. | amoeba |
| Answer» C. fungi | |
| 71. |
Temperature range for 'pasteurization' is |
| A. | 60°C-70°C |
| B. | 62°C-72°C |
| C. | 65°C-75°C |
| D. | 121°C-130°C |
| Answer» C. 65°C-75°C | |
| 72. |
A class of protein, functions as an antibodies, present in cells and serum of immune system, called |
| A. | Myoglobin |
| B. | Immunoglobin |
| C. | Hemeoglobin |
| D. | Globular proteins |
| Answer» C. Hemeoglobin | |
| 73. |
During penicillin production, the temperature is maintained at |
| A. | room temperature |
| B. | 26 °C |
| C. | 36 °C |
| D. | 46 °C |
| Answer» C. 36 °C | |
| 74. |
A second line drug that is used for treatment of 'tuberculosis' is called as |
| A. | Cycloserine |
| B. | Cephalosporin |
| C. | Monobactams |
| D. | Vancomycin |
| Answer» B. Cephalosporin | |
| 75. |
Which is true about drug |
| A. | produced by the endocrine glands |
| B. | produced by the exocrine glands |
| C. | secreted through pituitary gland |
| D. | externally administered chemical substances |
| Answer» E. | |
| 76. |
Nystatin is a drug used for treatment of diseases caused by |
| A. | gram negative bacterium |
| B. | gram positive bacterium |
| C. | yeast |
| D. | protozoan |
| Answer» D. protozoan | |
| 77. |
A synthetic substitute, synthesized by causative agent of disease, in treating variety of diseases, known as |
| A. | Drug |
| B. | Antibiotic |
| C. | Antibody |
| D. | Vaccine |
| Answer» E. | |
| 78. |
Which of the following antibiotics can't be used for treatment of infections with β-lactamase-producing Staphylococcus aureus? |
| A. | Vancomycin |
| B. | Ampicillin/sulbactam |
| C. | Cephalothin |
| D. | Piperacillin |
| Answer» E. | |
| 79. |
Which is not an amino acid and peptide antibiotic? |
| A. | Penicillin |
| B. | Actinomycin |
| C. | Bacitracin |
| D. | Tetranactin |
| Answer» E. | |
| 80. |
'Penicillin' is a drug, destroying cells, if they are in a growing stage, so in this way penicillin is known to be a |
| A. | Bacteriocins |
| B. | Bactericidal |
| C. | Bacteriostatic |
| D. | Bacteria inhibiting |
| Answer» C. Bacteriostatic | |
| 81. |
Removal and killing of all microorganisms is known as |
| A. | Destruction |
| B. | Sterilization |
| C. | Pasteurization |
| D. | Removal |
| Answer» C. Pasteurization | |
| 82. |
More promising chemotherapeutic agents for treating viral diseases is |
| A. | leukocytic interferon |
| B. | fibroblast interferon |
| C. | interferon |
| D. | nystatin |
| Answer» D. nystatin | |
| 83. |
Quinones and related antibiotics are |
| A. | tetracyclines |
| B. | actinorhodin |
| C. | mitomycin |
| D. | all of these |
| Answer» E. | |
| 84. |
The penicillin stable in gastric acid and suitable for oral administration is |
| A. | methicillin |
| B. | carbenicillin |
| C. | closacillin |
| D. | pencillin-G |
| Answer» D. pencillin-G | |
| 85. |
A bactericidal drug that inhibits activity of 'DNA' gyrase, ultimately inhibit synthesis of |
| A. | Bacterial RNA |
| B. | Bacterial DNA |
| C. | Ribosome |
| D. | Mitochondria |
| Answer» C. Ribosome | |
| 86. |
Time duration for 'pasteurization' is |
| A. | 30 minutes |
| B. | 20 minutes |
| C. | 15 minutes |
| D. | 11 minutes |
| Answer» B. 20 minutes | |
| 87. |
Nystatin is produced from the strain _____________________ |
| A. | Streptomyces noursei |
| B. | Streptomyces aureofaciens |
| C. | Streptomyces kanamyceticus |
| D. | Streptomyces fradiae |
| Answer» B. Streptomyces aureofaciens | |
| 88. |
Griseofulvin is useful in the therapy of nonsystemic fungal infections. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 89. |
Which of the following antibiotic have a sparing effect on the B12 in the diet? |
| A. | Streptomycin |
| B. | Tetracycline |
| C. | Anthramycin |
| D. | Chloramphenicol |
| Answer» B. Tetracycline | |
| 90. |
Antibiotics are not effective against plant pathogens. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 91. |
Which of the following antibiotic is not involved in inhibition of specific enzyme systems? |
| A. | Penicillin |
| B. | Tetracycline |
| C. | Sulphonamides |
| D. | Chloramphenicol |
| Answer» D. Chloramphenicol | |
| 92. |
Bacterial cells grown in a medium exposed to high osmotic pressure, changes shape from rod-shaped to __________ shaped. |
| A. | spherical |
| B. | rod shaped |
| C. | irregular |
| D. | elongated |
| Answer» B. rod shaped | |
| 93. |
Which of the following chemothearpeutic agent is extensively used because of their antibacterial effectiveness in a wide range of bacterial infections? |
| A. | arsphenamine |
| B. | sulfanilamide |
| C. | sulfonamide |
| D. | sulfadiazine |
| Answer» E. | |
| 94. |
Cell-wall biosynthesis is inhibited by antibiotics by inhibiting the biosynthesis of which of the following ? |
| A. | lipopolysaccharide |
| B. | cellulose |
| C. | peptidoglycan |
| D. | proteins |
| Answer» D. proteins | |
| 95. |
Life is not threatened if meningitis is caused by |
| A. | virus |
| B. | bacteria |
| C. | fungi |
| D. | amoeba |
| Answer» B. bacteria | |
| 96. |
Which of the following inhibits protein synthesis by combining with the 50S subunit ribosome? |
| A. | Streptomycin |
| B. | Tetracycline |
| C. | Chloramphenicol |
| D. | Penicillin |
| Answer» D. Penicillin | |
| 97. |
The international unit of penicillin is defined by how much amount of International Standard? |
| A. | 1 mg |
| B. | 0.262 µg |
| C. | 0.5988 µg |
| D. | 0.5 mg |
| Answer» D. 0.5 mg | |
| 98. |
Polymyxins inhibits the growth of the microbes by carrying out which of the following actions? |
| A. | inhibition of cell-wall synthesis |
| B. | damage to cytoplasmic membrane |
| C. | inhibition of nucleic acid and protein synthesis |
| D. | inhibition of specific enzyme systems |
| Answer» C. inhibition of nucleic acid and protein synthesis | |
| 99. |
Antibiotic produced by Streptomyces rimosus is _______________ |
| A. | chlortetracycline |
| B. | oxytetracycline |
| C. | tetracycline |
| D. | doxycycline |
| Answer» C. tetracycline | |
| 100. |
Streptomycin is produced by which of the following organisms? |
| A. | Stretomyces noursei |
| B. | Streptomyces nodosus |
| C. | Streptomyces fradiae |
| D. | Streptomyces griseus |
| Answer» E. | |