Microbiology MCQ (Quiz-3)  

Sterilization of culture media

Multiple choice questions with answer key

S. Y. B. PHARM Sem - III  (UNIT - 3)  

AS PER PCI SYLLABUS





1. Tyndallisation was proposed by
      A) Koch


... Answer is : B) Tyndall


2. By pasteurization




... Answer is : A) Only pathogenic forms can be removed

3. In the medium other than nutrients, if any substance is used in excess, that medium is





... Answer is : C) Enriched medium

4. Example of Anaerobic medium is




... Answer is : B) Robertson cooked-meat medium


5. Best method for getting pure culture is




... Answer is : C) Both A and B

6. The bacterial culture prepared by pure culture is .




... Answer is : C) Inoculum

7. Growth period of the culture is




... Answer is : C) Incubation

8. In autoclave, the principle involved is





... Answer is : D) Both A and C


9. Factors on which disinfectivity of a disinfectant depends





... Answer is : D) All of the above

10. Accridine dyes are more effective against




... Answer is : D) Gram positive

11.Viruses can be cultivated in




... Answer is : D) Living cells


12.The temperature required for pasteurization is




... Answer is : C) Below 100 oC

13. Example for indicator medium is




... Answer is : B) Wilson and Blair

14. The differentiate lactose and non-lactose fermentors, the medium used is




... Answer is : A) Mac-Conkey’s Agar

15. To transfer cultures from one place to another, the device used is




... Answer is : C) Needle


16. Separation of a single colony is




... Answer is : C) Isolation

17. At the temperature 160 oC for one hour, complete sterilization occurs in




... Answer is : A) Hot air oven


18. The spores of the bacteria which can withstand the moist heat effect also




... Answer is : B) Bacillus stearothermophilus

19. Aldehydes, which are most powerful disinfectants




... Answer is : C) Both A and B


20. The sterilizing agent is




... Answer is : D) Ethelene oxide