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