ype of staining is most useful for studying the morphology of bacterial cells an
ID: 217259 • Letter: Y
Question
ype of staining is most useful for studying the morphology of bacterial cells and characterizing some of the external structures such as the capsule? a. stainingb. staining . Acid fast staining d. Negative staining 12. Examples of basic dyes used in the Microbiology lab are a. Methylene blue b. Crystal violet c, Safranin d' All ofthe above the method and method. a. Dorner method b.Gram stainStreak plate d. Inoculating method 14. A medium such as EMB (Eosin methylene blue) that allows certain bacteria to grow others from growing is an example of a a. Complex medium b. Defined C. 15. To destroy all forms of life including endospores, all media is sterilized using a. Dry heat b. Radiation exposure for 30 minutes c. A pressure cooker d. Exposure for 15-30 minutes to steam under pressure (ISpsi) 16. An organism such as a. E. coli b. Saureus is classified as gram negative. d. Both a and c are correct c. P. vulgaris 17. Plates should be inverted during incubation to avoid a. Contamination b. Transformation of bacterial cells d. All of the above c. The buildup of condensation on the medium 18. The purpose of heat fixing a smear is to a. Adhere the cells to the slide b. Preserve their structural integrity c. Kill the cells d. Both a and b are correct 19. Gram staining is an example of a. Acid fast staining b. Acid staining c. Differential staining d. All of the above 20. Which of the following statement are true regarding gram positive bacteria a. Cell wall has a thick peptidoglycan layer b. Cell wall has a thin layer of peptidoglycan layer c. The LPS layer is thiclk d. All of the above are true of gram positive bacteria 21. After ethanol treatment, an organism such as E. coli can be visualized a. Only by counterstaining with crystal violet c. Only by the addition of lodine b. Only by counterstaining with safranind. All of the above 22. In Gram staining the primary stain used is a. Methylene blue b. Crystal violetc. Safranin d. Malachite greenExplanation / Answer
11. The answer should be option (d) negative staining.
12. The answer is option (d) all of these
13. The answer is option (c)streak plate method
14. The answer is option (c) selective
15. The answer is option (d) exposure for 15- 30 minutes to steam under 15 psi.
16. The correct option is option (d) both a and c are correct
17. I think the answer is option (d) all of the above , but im not sure.
18. The correct option is option (a) adhere cells to the slide.
19. The correct option is (c) differential staining
20. The correct option is option (a) cell wall has a thick peptido glycan layer.
21. The correct option is option (b) only counterstaining by safranine.
22. The correct option is option ( b) Crystal violet.
Hopefully it helps thanks
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