BIOL 2121 Final Exam Questions With
Correct Answers
Parts of a microscope - CORRECT ANSWER✔✔-eyepiece, objective lens,
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fine adjustment know, course adjustment knob, stage, stage clips,
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diaphragm
microscope - CORRECT ANSWER✔✔-an optical instrument used for
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viewing very small objects, such as mineral samples or animal or plant
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cells, typically magnified several hundred times.
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Illuminator/Light Source - CORRECT ANSWER✔✔-produces light or | | | | | | |
reflects light up toward the eyepiece
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diaphragm (microscope) - CORRECT ANSWER✔✔-controls the amount
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of light passing through the specimen
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condenser lens - CORRECT ANSWER✔✔-small substage lens that
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gathers the light coming in from the illuminator and concentrates that
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light into a light cone onto the specimen.
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,coarse focus knob - CORRECT ANSWER✔✔-This allows you to move the
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stage of the microscope up and down so that you can unblur the slide.
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brings an object into focus at low power
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fine focus knob - CORRECT ANSWER✔✔-brings an object into focus at
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high power, |
Used to sharpen the focus quality of the image after it has been brought
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into focus with the coarse focus knob.
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stage of microscope - CORRECT ANSWER✔✔-flat platform where a slide
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with a specimen is placed for viewing.
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Nosepiece - CORRECT ANSWER✔✔-Holds the objectives and can be
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rotated to change the magnification
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objective lens - CORRECT ANSWER✔✔-the part of a compound light
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microscope that is located directly above the specimen and that | | | | | | | | | |
magnifies the image of the specimen | | | | |
Types of objective lenses - CORRECT ANSWER✔✔-scanning (4x), low
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power (10x), high power (40x), oil immersion (100x)
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ocular lens (eyepiece) - CORRECT ANSWER✔✔-low power lenses that
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are closest to the viewer's eye.
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, stage control knobs - CORRECT ANSWER✔✔-Two knobs that position
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the slide on the stage. Control knobs used to move the stage
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mechanically
base of microscope - CORRECT ANSWER✔✔-bottom of the microscope
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arm of microscope - CORRECT ANSWER✔✔-Supports the body and
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stage and is attached to the base.
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differential staining - CORRECT ANSWER✔✔-Gram staining, spore
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staining, and acid-fast staining; not useful for bacteria without cell walls
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negative staining - CORRECT ANSWER✔✔-staining the background
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instead of the cell | | |
negative staining reagents are uranyl acetate and uranyl formate.
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simple staining - CORRECT ANSWER✔✔-directly staining the bacterial
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cell with a positively charged dye in order to see bacterial detail
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acid fast stain - CORRECT ANSWER✔✔-a differential stain used to
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identify bacteria that are not decolorized by acid-alcohol
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Correct Answers
Parts of a microscope - CORRECT ANSWER✔✔-eyepiece, objective lens,
| | | | | | | | |
fine adjustment know, course adjustment knob, stage, stage clips,
| | | | | | | | |
diaphragm
microscope - CORRECT ANSWER✔✔-an optical instrument used for
| | | | | | | |
viewing very small objects, such as mineral samples or animal or plant
| | | | | | | | | | | |
cells, typically magnified several hundred times.
| | | | |
Illuminator/Light Source - CORRECT ANSWER✔✔-produces light or | | | | | | |
reflects light up toward the eyepiece
| | | | |
diaphragm (microscope) - CORRECT ANSWER✔✔-controls the amount
| | | | | | |
of light passing through the specimen
| | | | |
condenser lens - CORRECT ANSWER✔✔-small substage lens that
| | | | | | | |
gathers the light coming in from the illuminator and concentrates that
| | | | | | | | | | |
light into a light cone onto the specimen.
| | | | | | |
,coarse focus knob - CORRECT ANSWER✔✔-This allows you to move the
| | | | | | | | | | |
stage of the microscope up and down so that you can unblur the slide.
| | | | | | | | | | | | | |
brings an object into focus at low power
| | | | | | |
fine focus knob - CORRECT ANSWER✔✔-brings an object into focus at
| | | | | | | | | | |
high power, |
Used to sharpen the focus quality of the image after it has been brought
| | | | | | | | | | | | |
into focus with the coarse focus knob.
| | | | | | |
stage of microscope - CORRECT ANSWER✔✔-flat platform where a slide
| | | | | | | | | |
with a specimen is placed for viewing.
| | | | | |
Nosepiece - CORRECT ANSWER✔✔-Holds the objectives and can be
| | | | | | | | |
rotated to change the magnification
| | | |
objective lens - CORRECT ANSWER✔✔-the part of a compound light
| | | | | | | | | |
microscope that is located directly above the specimen and that | | | | | | | | | |
magnifies the image of the specimen | | | | |
Types of objective lenses - CORRECT ANSWER✔✔-scanning (4x), low
| | | | | | | | |
power (10x), high power (40x), oil immersion (100x)
| | | | | | |
ocular lens (eyepiece) - CORRECT ANSWER✔✔-low power lenses that
| | | | | | | | |
are closest to the viewer's eye.
| | | | |
, stage control knobs - CORRECT ANSWER✔✔-Two knobs that position
| | | | | | | | |
the slide on the stage. Control knobs used to move the stage
| | | | | | | | | | | |
mechanically
base of microscope - CORRECT ANSWER✔✔-bottom of the microscope
| | | | | | | |
arm of microscope - CORRECT ANSWER✔✔-Supports the body and
| | | | | | | | |
stage and is attached to the base.
| | | | | |
differential staining - CORRECT ANSWER✔✔-Gram staining, spore
| | | | | | |
staining, and acid-fast staining; not useful for bacteria without cell walls
| | | | | | | | | |
negative staining - CORRECT ANSWER✔✔-staining the background
| | | | | | |
instead of the cell | | |
negative staining reagents are uranyl acetate and uranyl formate.
| | | | | | | |
simple staining - CORRECT ANSWER✔✔-directly staining the bacterial
| | | | | | | |
cell with a positively charged dye in order to see bacterial detail
| | | | | | | | | | |
acid fast stain - CORRECT ANSWER✔✔-a differential stain used to
| | | | | | | | | |
identify bacteria that are not decolorized by acid-alcohol
| | | | | | |
