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NSG 120 Bailey And Scotts Diagnostic Microbiology 13th Edition By Patricia

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John Marsh
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Bailey And Scotts Diagnostic Microbiology 13th Edition By Patricia M. – Test Bank.docx

Strayer University

Fundamentals of nursing (NSG 120)

Chapter 06: Role of Microscopy
Test Bank
MULTIPLE CHOICE
1. In microscopy, resolution can be defined as the:
a. magnification power.
b. extent to which detail in the magnified object is maintained.
c. ability of objects to stand out from the background.
d. ability to see objects against a black background.

2. Contrast in microscopy is most commonly achieved by:
a. changing objectives for various specimens.
b. increasing the resolution or resolving power.
c. staining techniques.
d. adding a blue filter to the light path.

3. The first step in the Gram-stain sequence is the application of _______, which is the primary
stain.
a. safranin
b. crystal violet
c. Gram’s iodine
d. Gram’s decolorizer

4. A mordant that is applied after the primary stain to bond chemically the alkaline dye to the
bacterial cell wall is:
a. safranin.
b. crystal violet.
c. Gram’s iodine.
d. Gram’s decolorizer.

5. After which step in the Gram-stain procedure are gram-positive bacteria first distinguished from
gram-negative bacteria?
a. Crystal violet
lOMoARcPSD|6170641
b. Iodine mordant
c. Gram’s decolorizer
d. Safranin

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NSG 120 Bailey And Scotts Diagnostic Microbiology 13th Edition By Patricia

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