MICROBIOLOGY OPENSTAX CHAPTER 2 EXAM QUESTIONS AND ANSWERS. VERIFIED 2025/2026.

MICROBIOLOGY OPENSTAX CHAPTER
2 EXAM QUESTIONS AND ANSWERS.
VERIFIED 2025/2026.




Brightfield and Darkfield - ANS two types of microscopy



Bacillis Anthracis - ANS cells in cerebrospinal fluid (the rod

-

shaped bacterial cells are surrounded by

larger white blood cells)



Darkfield Microscopy - ANS Light objects are visible against a dark background

Opaque disk placed in condenser

Only light reflected off the specimen enters the objective lens



Borrelia burgdorferi

, - ANS causes Lyme disease



Wavelength - ANS Distance from peak to peak of a wave




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, Amplitude - ANS Height of each peak or trough.



Frequency - ANS Number of wavelengths/unit time (Hertz -Hz). Energy increases with
frequency. Wavelength also decreases with higher frequencies.



Photons - ANS Packet of light energy.



Reflection - ANS When a light wave bounces off of an object.



Absorbance - ANS When a light wave is captured by a material.



Phosphorescence - ANS When energy is absorbed and later re-emitted.



Transmission - ANS Passage of a light wave through a material. A material may allow more
light to pass when it is thin or transparent.



Transparency - ANS Allowing more light to pass through



Opacity - ANS Allowing less light to pass through



Interference - ANS interaction between light waves; rock in pond



Diffraction - ANS Interaction between a light wave and an object -bending or scattering the
light.



Properties of Light - ANS Light travels in straight lines

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