Multiple Choice
Which of the following reagents acts as the mordant by reacting with crystal violet during the Gram staining procedure?
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9. Microscopes
Introduction to Staining
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Staining cells such that their color is different from the background enhances their:
A
osmotic pressure
B
contrast
C
motility
D
metabolic activity
Verified step by step guidance1
Understand the purpose of staining in microbiology: staining is used to make cells or cellular components more visible under a microscope by adding color to them.
Recognize that when cells are stained, their color becomes different from the background, which helps in distinguishing the cells clearly.
Identify that this difference in color between the cells and the background is referred to as 'contrast' in microscopy.
Contrast enhances the visibility and differentiation of cells, making it easier to observe their shape, size, and arrangement.
Note that osmotic pressure, motility, and metabolic activity are biological properties of cells, but staining primarily affects the visual contrast, not these properties.
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