MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The anti tumor antibiotics act by inhibiting |
| A. | Cell wall synthesis |
| B. | RNA synthesis |
| C. | Cell membrane synthesis |
| D. | The DNA structure & function |
| Answer» E. | |
| 2. |
Streptokinase is produced by |
| A. | Staphylococcus aureus |
| B. | Streptococcus pneumoniae |
| C. | Str. faecalis |
| D. | Str. pyogenes |
| Answer» E. | |
| 3. |
In India, Japanese b encephalitis was firstisolated from the mosquitoes of the |
| A. | Culex tritaeriorhynchus |
| B. | Culex annulirostris |
| C. | Culex vishnui |
| D. | None of these |
| Answer» D. None of these | |
| 4. |
The lethal dose required to kill 50% of thelab animals tested under standard called |
| A. | ID |
| B. | LD50 |
| C. | ID50 |
| D. | MLD |
| Answer» C. ID50 | |
| 5. |
Diagnostic test for the identification ofprimary syphilis: |
| A. | VDRL test |
| B. | Treponema pallidum immobilization test |
| C. | Kahn’s test |
| D. | Dark ground microscopic examination |
| Answer» E. | |
| 6. |
The organisms which can grow both inpresence and absence of oxygen |
| A. | Aerobes |
| B. | Anaerobes |
| C. | Faculative anaerobes |
| D. | Strict aerobes |
| Answer» B. Anaerobes | |
| 7. |
Batch fermentation is also called |
| A. | Closed system |
| B. | Open system |
| C. | Fed-Batch system |
| D. | Sub-merger system |
| Answer» B. Open system | |
| 8. |
Malate dehydrogenase enzyme is a |
| A. | Transferase |
| B. | Hydrolase |
| C. | Isomerase |
| D. | Oxido reductase |
| Answer» E. | |
| 9. |
The apparatus used to ma inta in a continuous culture |
| A. | Chemostat |
| B. | Autostat |
| C. | Thermostat |
| D. | Both a and c |
| Answer» B. Autostat | |
| 10. |
Mountax reaction is used for detectionof |
| A. | T |
| B. | b. Diphtheria |
| C. | Cholera |
| D. | None of these |
| Answer» B. b. Diphtheria | |
| 11. |
Following is the marker of HIV infectionin blood: |
| A. | Reverse transcriptase |
| B. | DNA polymerase |
| C. | RNA polymerase |
| D. | None of these |
| Answer» B. DNA polymerase | |
| 12. |
The antibiotic produced from Bacillussubtilis is |
| A. | Vancomycin |
| B. | Bactiracin |
| C. | Both a and b |
| D. | None of these |
| Answer» C. Both a and b | |
| 13. |
Which of the following is called serumHepatitis? |
| A. | HCV |
| B. | HAV |
| C. | HBV |
| D. | HIV |
| Answer» D. HIV | |
| 14. |
Hydatid disease is identified by |
| A. | Schick test |
| B. | Dick test |
| C. | Casoni test |
| D. | Freis test |
| Answer» D. Freis test | |
| 15. |
Toxin produced by C. botulism is |
| A. | Botulin |
| B. | Tetanospasmin |
| C. | Tetanolysin |
| D. | Cholaragen |
| Answer» B. Tetanospasmin | |
| 16. |
Congential diseases are |
| A. | Diseases present at birth |
| B. | Deficiency disease |
| C. | Occur during life |
| D. | Spread from one individual to another |
| Answer» B. Deficiency disease | |
| 17. |
Optimum growth temperature is greaterthat 45oC is |
| A. | Mesophile |
| B. | Thermophiles |
| C. | Psychrophiles |
| D. | None of these |
| Answer» B. Thermophiles | |
| 18. |
The enzymes which are commonly usedin genetic engineering are |
| A. | Exonuclease and ligase |
| B. | Restriction endonuclease and polymerase |
| C. | Ligase and polymerase |
| D. | Restriction endonuclease and ligase |
| Answer» B. Restriction endonuclease and polymerase | |
| 19. |
Viral DNA is resistant to DNA of the host cell because it contains |
| A. | 5’-HMC |
| B. | 5’-HMA |
| C. | 5’-CHM |
| D. | 5’MHC |
| Answer» B. 5’-HMA | |
| 20. |
Multiple antibiotic resistance is mediatedby |
| A. | Episome |
| B. | Plasmid |
| C. | Colplasmid |
| D. | Both b and c |
| Answer» C. Colplasmid | |
| 21. |
Vacc ines are prepared from k i l ledmicrobes, they are |
| A. | Inactivated (killed) vaccine |
| B. | Attenuated vaccines |
| C. | Autogenous vaccine |
| D. | None of these |
| Answer» B. Attenuated vaccines | |
| 22. |
Viral antigens are likely |
| A. | Protein |
| B. | Glyco proteins |
| C. | Lipo proteins |
| D. | Both a and b |
| Answer» E. | |
| 23. |
Wilson and Blair medium is used forisolation of |
| A. | Staphylococci |
| B. | Salmonella typhosa |
| C. | Vibrio cholerae |
| D. | Shigella shigae |
| Answer» C. Vibrio cholerae | |
| 24. |
DNA-replication is by the mechanism of |
| A. | Conservative |
| B. | Semiconservative |
| C. | Dispersive |
| D. | None of the above |
| Answer» C. Dispersive | |
| 25. |
Following substance may act as anantigen |
| A. | Egg albumin |
| B. | RBC and serum |
| C. | Vegetable protein |
| D. | Snake venom |
| Answer» D. Snake venom | |
| 26. |
The motile bacteria is |
| A. | S. typhi |
| B. | K. pneumoniae |
| C. | B. anthracis |
| D. | Shigella |
| Answer» B. K. pneumoniae | |
| 27. |
Mycotoxins are formed during the end of |
| A. | Lag phase |
| B. | Log phase |
| C. | Death phase |
| D. | Stationary phase |
| Answer» B. Log phase | |
| 28. |
Which one of the following mineral elements play an important role in biological nitrogen fixation |
| A. | Copper |
| B. | Magnesium |
| C. | Zinc |
| D. | Molybdenum |
| Answer» E. | |
| 29. |
Thylakoid is present in |
| A. | Mitochondria |
| B. | Chloroplast |
| C. | ER |
| D. | Golgi apparatus |
| Answer» C. ER | |
| 30. |
Candida albicans is capable to form |
| A. | Single cell |
| B. | Pseudomonas |
| C. | Multicellular forms |
| D. | None of these |
| Answer» C. Multicellular forms | |
| 31. |
Local immunity is important in |
| A. | Influenza |
| B. | Allergy |
| C. | Polio |
| D. | All of these |
| Answer» E. | |
| 32. |
Gram staining is an example for |
| A. | Simple staining |
| B. | Differential staining |
| C. | Negative staining |
| D. | None of these |
| Answer» E. | |
| 33. |
The utilization of light energy to drive thesynthesis of ATP is called as |
| A. | Photolysis |
| B. | Photophosphorylation |
| C. | Photosynthesis |
| D. | Respiration |
| Answer» D. Respiration | |
| 34. |
Infrared radiation is a method of sterilization by |
| A. | Dry heat |
| B. | Moist heat |
| C. | Chemical method |
| D. | Mechanical method |
| Answer» E. | |
| 35. |
Bacterial capsule is chemically composed of |
| A. | Polypeptide |
| B. | Polynucleotides |
| C. | Polysaccharides |
| D. | Polypeptides or polysaccharides |
| Answer» E. | |
| 36. |
Limit of resolution of compound microscope is |
| A. | 0.018 Ao |
| B. | 0.1 mm |
| C. | 5 ìm |
| D. | 1 mm |
| Answer» C. 5 ìm | |
| 37. |
If the microorganisms are allowed tonutrient medium is called |
| A. | Submerged fermentation |
| B. | Surface fermentation |
| C. | Dual fermentation |
| D. | All of these |
| Answer» C. Dual fermentation | |
| 38. |
Sero conservation in HIV infection takesplace in |
| A. | 3 week |
| B. | 6 weeks |
| C. | 9 weeks |
| D. | 12 weeks |
| Answer» D. 12 weeks | |
| 39. |
The bacterial cells participating inconjugation are |
| A. | Conjugant |
| B. | Fertile cells |
| C. | Exconjugants |
| D. | None of these |
| Answer» B. Fertile cells | |
| 40. |
Which of the following is the most specificin diagnosis of AIDS? |
| A. | IHA |
| B. | Western blot |
| C. | ELISA |
| D. | Immuno electrophoresis |
| Answer» C. ELISA | |
| 41. |
The most active stage in the sigmoid curve of bacteria in which maximum growth is attained |
| A. | Lag phase |
| B. | Stationary phase |
| C. | Decline phase |
| D. | Log phase |
| Answer» E. | |
| 42. |
The action of alcohol during Gramstaining is |
| A. | Allows the color |
| B. | It adds color |
| C. | Decolorises the cells |
| D. | None of these |
| Answer» D. None of these | |
| 43. |
Which one of the following was Gramnegative, chemolithotrophic bacteria? |
| A. | Siderococcu |
| B. | E.coli |
| C. | Spirellum |
| D. | Mycoplasms |
| Answer» C. Spirellum | |
| 44. |
Sporozite vaccine in malaria has |
| A. | Induces antibodies |
| B. | Prevents only asexual forms with reproduction |
| C. | No effects on clinical illness |
| D. | None of the above |
| Answer» B. Prevents only asexual forms with reproduction | |
| 45. |
Wh ich of the fo l low ing method ofsterilization has no effect on spores? |
| A. | Drying |
| B. | Hot air oven |
| C. | Autoclave |
| D. | None of these |
| Answer» B. Hot air oven | |
| 46. |
The differentiate lactose and non-lactosefermentors, the medium used is |
| A. | Wilson & lair |
| B. | Blood Agar |
| C. | Tetra thionate broth |
| D. | Mac-Conkey’s Agar |
| Answer» E. | |
| 47. |
Aspergillus niger is used generally for theproduction of |
| A. | Ethanol |
| B. | Penicillin |
| C. | Citric acid |
| D. | Lactic acid |
| Answer» D. Lactic acid | |
| 48. |
The nucleic acid of polio viruses is |
| A. | DNA |
| B. | RNA – (+) type |
| C. | t-RNA |
| D. | m-RNA |
| Answer» C. t-RNA | |
| 49. |
Geraman measles is also known as |
| A. | Rubella / 2-day measles |
| B. | Rubella / 3day measles |
| C. | Rubella / 4-day measles |
| D. | Rubella / 1-day measles |
| Answer» C. Rubella / 4-day measles | |
| 50. |
bacitracin sensitivity test is done for |
| A. | Pneunocci |
| B. | Group ‘A’ Streptococci |
| C. | Gonococci |
| D. | Staphylococci |
| Answer» C. Gonococci | |