MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For sterilization of plastic syringes in hospitals which of the following agents are used? |
| A. | ethylene oxide |
| B. | dyes |
| C. | radiations |
| D. | heavy metals |
| Answer» B. dyes | |
| 2. |
Which of the following is the mode of action of formaldehyde? |
| A. | interference with glycolysis |
| B. | shows oxidizing property |
| C. | combines with vital nitrogen compounds |
| D. | changes the permeability of cytoplasmic membrane |
| Answer» D. changes the permeability of cytoplasmic membrane | |
| 3. |
Iodine kills the microorganisms by causing the denaturation of proteins. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which of the following agent is used to disinfect skin? |
| A. | Chlorine |
| B. | Formaldehyde |
| C. | Quaternaries |
| D. | Ethylene oxide |
| Answer» D. Ethylene oxide | |
| 5. |
Which of the following chemical agents lack penetrating power? |
| A. | Phenol |
| B. | Iodine |
| C. | Ethylene oxide |
| D. | Beta-propiolactone |
| Answer» E. | |
| 6. |
Which of the following acts as a test organism in the procedure of phenol-coefficient method? |
| A. | Escherichia coli |
| B. | Streptococcus faecalis |
| C. | Staphylococcus aureus |
| D. | Lactobacillus |
| Answer» D. Lactobacillus | |
| 7. |
We observe increased growth in nutrient agar plates as concentration of chemical agent is decreased. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Liquid water-soluble substances appropriately diluted are dispensed into sterile test tubes, to which are added a measured amount of the test organism and then this is transferred into tubes of sterile media.This method helps in determining _____________________ |
| A. | whether the inhibitory action is bactericidal |
| B. | whether the inhibitory action is bacteristatic |
| C. | decrease in the amount of growth |
| D. | complete absence of growth |
| Answer» B. whether the inhibitory action is bacteristatic | |
| 9. |
Which of the following methods is used for determining the decrease in the amount of growth? |
| A. | test done on agar medium plate |
| B. | test done into an agar medium or broth |
| C. | test done by transfering water-soluble substances to sterile media |
| D. | by phenol-coefficient method |
| Answer» C. test done by transfering water-soluble substances to sterile media | |