100 Top Sterlisation, Culture Media & Pure Culture Techniques Objective Type Questions And Answers

11. Separation of a single bacterial colony is calle
a. Isolation
b. Separation
c. Pure culturing
d. All of these
Ans: A

12. Which of the following is ionizing radiation?
a. U.V. rays
b. IR
c. ?-rays
d. None of these
Ans: C

13. Which of the following induces dimerisation of thymine?
a. X-rays
b. U.V. rays
c. ã-rays
d. None of these
Ans: B

14. When food material are preserved at a temperature just above freezing temperature, the process is called.
a. Freezing
b. Pasteurisation
c. Chilling
d. Frosting
Ans: C

15. Which of the following method of sterilization has no effect on spores?
a. Drying
b. Hot air oven
c. Autoclave
d. None of these
Ans: A

16. Treponema pallidum can be best indentified using
a. Fluorescence microscope
b. Bright field microscope
c. Dark field microscope
d. Flourescence microscope
Ans: B

17. Autoclaving is carried at
a. Dry heat
b. Atmospheric pressure
c. 120oC
d. All of these
Ans: C

18. Temperature in pasteurization is
a. 62.8oC
b. 35.7oC
c. 68.2oC
d. 60.8oC
Ans: A

19. The bacterial culture prepared by pure culture method is
a. Inoculum
b. Suspension
c. Dilution
d. None of these
Ans: A

20. Algae are rich in
a. Carbohydrates
b. Proteins
c. Vitamins
d. All of these
Ans: D

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