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There are two major types of simple stains used to better visualize microorganisms. What are these two types of simple stains and how do they differ?
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9. Microscopes
Simple Staining
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Which of the following statements is true?
A
A basic dye is negatively charged & stains the outside of a cell while an acidic dye is positively charged & stains the inside of a cell.
B
A basic dye is positively charged & stains the inside of a cell while an acidic dye is negatively charged & stains the outside of a cell.
C
A basic dye is positively charged & stains the outside of a cell while an acidic dye is negatively charged & stains the inside of a cell.
D
A basic dye is negatively charged & stains the inside of a cell while an acidic dye is negatively charged & stains the outside of a cell.
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Understand the properties of basic and acidic dyes: Basic dyes are positively charged, while acidic dyes are negatively charged.
Consider the interaction between dyes and cellular components: Positively charged basic dyes are attracted to negatively charged components inside cells, such as nucleic acids and certain proteins.
Recognize the staining process: Basic dyes typically stain the inside of cells due to their attraction to negatively charged cellular components.
Analyze the role of acidic dyes: Acidic dyes, being negatively charged, are repelled by the negatively charged components inside cells and thus stain the outside or background.
Evaluate the statements based on these principles: Identify which statement correctly describes the charge and staining behavior of basic and acidic dyes.
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