SCI250 Week 1 Chapter 3 Staining Lab Quiz
Section: Multiple Choice (highlight, bold, or underline your response)
Which of the following stains is used frequently to identify Mycobacterium and other bacteria whose cell walls contain high amounts of lipids?
2. Which of the following stains is used to classify microorganisms based on their cell wall content?
.3. In the Gram stain, Gram-positive bacteria stain with a _________ color due to the incorporation of the _________ dye into their cell wall.
4.What is the function of the mordant iodine in a Gram staining procedure?
5.What is the order of reagents used in the Gram stain?
6. Following a Gram stain you observe clear, glassy areas inside the bacterial cells. What does this suggest? Which stain would you use to confirm this?
7.The presence of a capsule around bacterial cells usually indicates their increased disease-causing potential and resistance to disinfection. Capsules are generally viewed by ________
Section: True or False
8.Fluorescent microscopes use an ultraviolet (UV) light source and fluorochromes as stains.
9.Older, pure cultures of Gram-positive organisms can appear red when Gram stained.
10.Use of two or more dyes to differentiate among bacterial species or to distinguish various structures of an organism; for example, the Gram stain.
11.A technique for observing flagella by coating the surfaces of flagella with a dye or a metal such as silver.
12.A differential stain used to make endospores easier to visualize.
13.A single dye used to reveal basic cell shapes and arrangements.
14.A differential stain for organisms that are not decolorized in alcohol, such as the bacteria that cause Hansen’s Disease (leprosy) and tuberculosis.
15.An ionic compound, used for staining bacteria, in which the positive ion imparts the color.
Cationic dye (also called basic dye)
Other CHEAP Resources:
SCI 250 v3 appendix C
SCI250 Week 1 Chapter 3 Staining Lab Quiz
SCI250 Week 5 Chapter 19 Integumentary System Quiz
SCI250 Week 6 Chapter 21 Respiratory System Quiz
SCI250 Week 7 Final Examination
SCI250 Week 7 Chapter 24 Nervous System Quiz
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