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Microbiology Practice Test: The Microscopic Examination of Microorganisms
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Microscopic Examination of Microorganisms topics include: Light microscope, microbial Stains, transmission and scanning electron microscope.  Microorganisms are studied and observed using microscopes. However, bacteria have a similar refractive index to water, making them visually opaque. Therefore, microbial cells are routinely stained for clear microscopic examination.  Here are some microscopic examination techniques for microorganisms: Gram staining: A microbiological staining procedure that helps identify microorganisms under the microscope. Capsule staining: A method used to... Show more
Microbiology Practice Test: The Microscopic Examination of Microorganisms
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25 Questions

1. Total Magnification is obtained by __________
2. Negative Staining is used for examining _____________
3. In light microscopy, which of the following is used as fixatives prior to staining technique?
4. Which bacteria appears purple-violet colour after staining?
5. Degree of scattering in transmission electron microscope is a function of __________
6. Electron Microscope can give a magnification up to ___________
7. Which of the following are true for Gram-negative bacteria?
8. Where do we obtain the magnified image of the specimen in SEM?
9. Which among the following helps us in getting a three-dimensional picture of the specimen?
10. Which of the staining technique helps in demonstrating spore structure in bacteria as well as free spores?
11. Which part of the light microscope controls the intensity of light entering the viewing area?
12. Resolving power of a microscope is a function of ____________
13. Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure?
14. Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed?
15. The greatest resolution in light microscopy can be obtained with ___________
16. Which of the following is used in electron microscope?
17. The dye eosinate of methylene blue belongs to which group?
18. Which of the following is the example of Gram-negative bacteria?
19. Oil immersion objective lens has an NA value of____________
20. In Gram-staining, iodine is used as a ______________
21. On what factors do the intensity of secondary electrons depend upon?
22. The secondary electrons radiated back in scanning microscope is collected by?
23. In Phase contrast microscopy, the rate at which light enters through objects is __________
24. What is the minimum distance for the eye to focus any object?
25. What is the correct order of staining reagents in Gram-Staining?