MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Ceepryn belongs to which of the following categories? |
| A. | Anionic detergents |
| B. | Cationic detergents |
| C. | Nonionic detergents |
| D. | Ammonium salts |
| Answer» C. Nonionic detergents | |
| 2. |
Gonococci are inhibited by tryptoflavine in dilutions of ____________ |
| A. | 1:200,000 |
| B. | 1:300,000 |
| C. | 1:1,000,000 |
| D. | 1:10,000,000 |
| Answer» E. | |
| 3. |
Which of the following is an acridine dye? |
| A. | crystal violet |
| B. | malachite green |
| C. | tryptoflavine |
| D. | brilliant green |
| Answer» D. brilliant green | |
| 4. |
Gram-negative organisms are more susceptible to higher concentrations of triphenylmethane dyes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which of the following agents cause death to the cell by coagulation of cytoplasmic proteins? |
| A. | Alcohol |
| B. | Dyes |
| C. | Chlorine |
| D. | Heavy metals |
| Answer» E. | |
| 6. |
Which among the following is an example of an organic compound of mercury? |
| A. | Mercuric chloride |
| B. | Mercuric oxide |
| C. | Mercurochrome |
| D. | Ammoniated mercury |
| Answer» D. Ammoniated mercury | |
| 7. |
Solutions of sodium hypochlorite of a 1% concentration are used for ________ |
| A. | sanitizing dairy equipment |
| B. | personal hygiene and a household disinfectant |
| C. | household bleaches |
| D. | disinfecting open wounds |
| Answer» C. household bleaches | |
| 8. |
How much percentage of the aqueous solution of phenol rapidly kills the vegetative cells of microorganisms? |
| A. | 1% |
| B. | 2% |
| C. | 5% |
| D. | 10% |
| Answer» D. 10% | |
| 9. |
WHICH_AMONG_THE_FOLLOWING_IS_AN_EXAMPLE_OF_ORGANIC_COMPOUND_OF_MERCURY??$ |
| A. | Mercuric chloride |
| B. | Mercuric oxide |
| C. | Mercurochrome |
| D. | Ammoniated mercury |
| Answer» D. Ammoniated mercury | |
| 10. |
Gram-negative organisms are more susceptible to higher concentrations of triphenylmethane dyes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which_of_the_following_agents_cause_death_to_the_cell_by_coagulation_of_cytoplasmic_proteins?$ |
| A. | Alcohol |
| B. | Dyes |
| C. | Chlorine |
| D. | Heavy metals |
| Answer» E. | |
| 12. |
Which of the following agents are used as a preservative in ophthalmic solutions? |
| A. | alcohol |
| B. | quaternary ammonium salts |
| C. | phenol |
| D. | aldehydes |
| Answer» C. phenol | |
| 13. |
Ceepryn belongs to which of the following categories? |
| A. | Anionic detergents |
| B. | Cationic detergents |
| C. | Nonionic detergents |
| D. | Ammonium salts |
| Answer» C. Nonionic detergents | |
| 14. |
Gonococci are inhibited by tryptoflavine in dilutions of ____________________ |
| A. | 1:200,000 |
| B. | 1:300,000 |
| C. | 1:1,000,000 |
| D. | 1:10,000,000 |
| Answer» E. | |
| 15. |
Which_of_the_following_is_an_acridine_dye? |
| A. | crystal violet |
| B. | malachite green |
| C. | tryptoflavine |
| D. | brilliant green |
| Answer» D. brilliant green | |
| 16. |
Solutions of sodium hypochlorite of a 1% concentration are used for _______? |
| A. | sanitizing dairy equipments |
| B. | personal hygiene and a household disinfectant |
| C. | household bleaches |
| D. | disinfecting open wounds |
| Answer» C. household bleaches | |
| 17. |
Chloramines are more stable than than hypochlorites. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
Chlorinated lime is the alternative name for __________________ |
| A. | Calcium hypochlorite |
| B. | Sodium hypochlorite |
| C. | Chloramine-T |
| D. | Azochloramide |
| Answer» B. Sodium hypochlorite | |
| 19. |
Which of the following agents irreversibly oxidize and inactivate proteins with sulphydral groups? |
| A. | Alcohol |
| B. | Phenol |
| C. | Iodine |
| D. | Chlorine |
| Answer» D. Chlorine | |
| 20. |
Polyvinylpyrrolidone (PVP) is a complex belonging to which group? |
| A. | Phenolic compounds |
| B. | Iodophors |
| C. | Metals |
| D. | Aldehyde |
| Answer» C. Metals | |
| 21. |
Alcohol concentrations above 60% are effective against _________________ |
| A. | bacteria |
| B. | fungi |
| C. | germs |
| D. | viruses |
| Answer» E. | |
| 22. |
The antimicrobial activity of phenolics is not reduced at which of the following conditions? |
| A. | acidic pH |
| B. | alkaline pH |
| C. | low temperatures |
| D. | presence of soap |
| Answer» E. | |
| 23. |
How much percentage of aqueous solution of phenol rapidly kills the vegetative cells of microorganisms? |
| A. | 1% |
| B. | 2% |
| C. | 5% |
| D. | 10% |
| Answer» D. 10% | |