Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 3, Problem 6R
Why is a mordant used in the
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Chapter 3 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 3 - Fill in the following blanks. 1. 1 m = ________ m...Ch. 3 - Prob. 2RCh. 3 - Prob. 3RCh. 3 - Prob. 4RCh. 3 - Prob. 5RCh. 3 - Why is a mordant used in the Gram stain? In the...Ch. 3 - Prob. 7RCh. 3 - Prob. 8RCh. 3 - Fill in the following table regarding the Gram...Ch. 3 - NAME IT A sputum sample from Calle, a 30-year-old...
Ch. 3 - Through the microscope, the green structures are...Ch. 3 - Prob. 2MCQCh. 3 - Carbolfuchsin can be used as a simple stain and a...Ch. 3 - Prob. 4MCQCh. 3 - Which of the following is not a functionally...Ch. 3 - Which of the following pairs is mismatched? 1....Ch. 3 - Assume you stain Clostridium by applying a basic...Ch. 3 - Prob. 8MCQCh. 3 - In 1996, scientists described a new tapeworm...Ch. 3 - Prob. 10MCQCh. 3 - Prob. 1ACh. 3 - Prob. 2ACh. 3 - Why isnt the Gram stain used on acid-fast...Ch. 3 - Endospores can be seen as refractile structures in...Ch. 3 - In 1882, German bacteriologist Paul Erhlich...Ch. 3 - Laboratory diagnosis of Neisseria gonorrhoeae...Ch. 3 - Assume that you are viewing a Gram-stained sample...
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- What staining technique is used here? What is the primary stain, decolorizing agent, and counter stain of this technique? Do we heat fix in here? Describe the organism with the blue color. Describe the organism with the bright pink color. Name the genus of bacteria with bright pink.arrow_forwardIs heat fixation used on bacterial smears that will undergo a capsule stain or flagella stain procedure? Why or why not?arrow_forwardWhy must young cultures be used when doing a Gram stain?arrow_forward
- With what kind of gram stain do you use heat fixation? What is the purpose of heat fixation? What solution do you use to wash a positive stain? A negative stain?arrow_forwardWhat is the function of the mordant used in the Gram staining procedure? If the iodine step is skipped, what color are Gram-negative cells observedarrow_forwardIn Gram staining method, list the reagents and state their role for each step of the procedure? In preparing bacterial smear, why do we need to pass the slide over the flame?arrow_forward
- On the basis of the reaction in the Gram stain, bacteria can be divided into which two major groups?arrow_forwardAre there any chemical differences between the cell walls of gram-positive and negative bacteria that might explain differences in the rate of decolorization ? Does the age of a culture affect the gram stain reaction ? Why or why not?arrow_forwardWhat is the purpose of the alcohol (OH) in the gram staining process? Explain.arrow_forward
- why does sometimes acid-fast bacteria accept the spore stain and spores accept the acid-fast stain.arrow_forwardwhat are the positive and negative results of the endospore stain procedure?arrow_forwardWhat color wouod gram negative cells appear if the decolorizing step was left out of staining procedure? Why?arrow_forward
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