Open Question
The type of fixation developed by Koch for bacteria is _______.
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
Gram-Staining is what type of staining technique?
A
A special staining technique.
B
A differential staining technique.
C
A simple staining technique
D
A fluorescent staining technique.
Verified step by step guidance1
Understand the purpose of Gram staining: It is used to differentiate bacterial species into two groups based on the chemical and physical properties of their cell walls.
Recognize the key characteristic of a differential staining technique: It involves using more than one chemical stain to differentiate between different microorganisms or structures.
Identify the steps involved in Gram staining: The process includes applying a primary stain (crystal violet), a mordant (iodine), a decolorizer (alcohol or acetone), and a counterstain (safranin).
Analyze the outcome of Gram staining: Gram-positive bacteria retain the crystal violet stain and appear purple, while Gram-negative bacteria do not and appear pink after counterstaining.
Conclude that Gram staining is a differential staining technique because it distinguishes between Gram-positive and Gram-negative bacteria based on their cell wall properties.
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