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Portage Learning Biod 171 Microbiology Module 3 Complete Study Guide And Practice Questions

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PORTAGE LEARNING BIOD 171 MICROBIOLOGY MODULE 3 COMPLETE STUDY GUIDE AND PRACTICE QUESTIONS

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PORTAGE LEARNING BIOD 171 MICROBIOLOGY
MODULE 3 COMPLETE STUDY GUIDE AND
PRACTICE QUESTIONS

◉ Micrometer.
Answer: (um) used to measure size of cells (10^6m) one-millionth
of a meter


◉ Nanometer.
Answer: (nm) measures cellular organelles and viruses (10^9m)
one-billionth of a meter


◉ Magnification.
Answer: increase in size of object


◉ Resolution.
Answer: Ability to distinguish between two points that are close
together(resolving power)


◉ Contrast.
Answer: Difference of light absorbance between two objects or the
object and its background

, ◉ True or False: Longer wavelengths increase resolving power.
Answer: False: Shorter wavelengths increase resolving power


◉ True or False: Hight Resolution= ability to see clearly and low
resolution: unable to see the object clearly.
Answer: True


◉ True or False: Most microorganisms are colorless.
Answer: True (Staining increases contrast)


◉ Light Microscopy.
Answer: Use visible light and blue wavelengths for improved
resolution, Magnification (1X-200X), Resolution: (10mm-200nm),
Whole Cells and Organelles


◉ Electron Microscopy.
Answer: uses electrons w/ specimens in a vacuum, Magnification:
(1,000x-1000,000x); Resolution:(1mm-0.1nm), Prokaryotic cells,
viruses, macromolecule and large atoms


◉ Probe Microscopy.

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