객관식
What is the primary purpose of using a biological stain when microscopically examining cellular components?
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- 1. Introduction to Microbiology3h 27m
- Introduction to Microbiology18m
- Introduction to Taxonomy26m
- Scientific Naming of Organisms9m
- Members of the Bacterial World10m
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- 21. Principles of Disease6h 57m
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- The Human Microbiome46m
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- 25. Epidemiology2h 24m
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- Introduction to Chain of Infection5m
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- Tests to Guide Antimicrobial Use21m
- Antimicrobial Resistance29m
- 29. Microbial Infections - Skin and Eyes46m
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- 33. Microbial Infections - Nervous System2h 18m
- 34. Microbial Infections - Urogenital System1h 40m
9. Microscopes
Introduction to Staining
객관식
Bacterial smears are fixed before staining to:
A
kill the bacteria and adhere them to the slide
B
increase the thickness of the smear
C
enhance the color intensity of the stain
D
prevent the stain from binding to the cells
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검증된 단계별 안내1
Understand the purpose of fixing a bacterial smear in microbiology: fixing is a preparatory step before staining that serves specific functions.
Recognize that fixing primarily serves to kill the bacteria, which is important for safety and to stop cellular processes that might alter the cells during staining.
Know that fixing also helps the bacterial cells adhere firmly to the microscope slide, preventing them from washing off during the staining and rinsing steps.
Consider the other options: increasing thickness, enhancing color intensity, or preventing stain binding are not the main purposes of fixing; these relate more to staining techniques or smear preparation.
Conclude that the correct reason for fixing is to kill the bacteria and adhere them to the slide, ensuring the sample remains intact and safe for microscopic examination.
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