Microbiology Quiz 5 (BIO 210)

MICROSCOPE

Week 5, Quiz 5

If magnification is optimized, what else needs to be considered to obtain the best possible image of a specimen?

Resolution

Contrast

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If you just wanted to observe what ==cell shape== a particular bacteria is, you could do a ____ stain

Simple

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Match the correct type of ==microscopy== to its application.

==TRANSMISSION EM:== Provides the most highly magnified view of the genetic material of COVID-19.

==PHASE CONTRAST:== Enables the viewer to quickly determine if microbes from an unstained specimen are motile (able to move) or not

==TRANSMISSION EM:== Used obtain a highly magnified view of the ribosomes inside a bacterial cell

==BRIGHTFIELD:== Used to view acid-fast stained bacteria from a tuberculosis patient

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Which of these is NOT found in Gram negative bacterial cell walls?

teichoic acids

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If you forgot to do the heat-fixing step prior to the Gram stain, predict what you would see:

You would not see anything on your slide

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If your microscope has a resolving power of 0.25 microns, you CAN clearly see structures that are microns apart.

0.25

2.5