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BIO 104, Lab Exam 1 Questions and Answers
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BIO 104, Lab Exam 1 Questions and Answers
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BIO 104, Lab Exam 1 Questions andAnswers
Most compound microscopes have ocular lenses of 10x and three objective lenses with
magnification of 4x, 10x, or 40x. What is the highest total magnification possible for
viewing a specimen?
A. 1600x
B. 400x
C. 50x
D. 64x
400X
Light is refracted by convex lenses such as the condenser lens of a compound
microscope. What does this do to specimens with defined orientation?
A. The image seen has no depth of field
B. The image seen is inverted and reversed
C. The image cannot be seen
D. The image seen is magnified
B. The image seen is inverted and reversed
Brainpower
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If you used the scanning objective to see the letter "e" in the correct orientation you
would need to:
A.Use the high power objective
B. Open the iris diaphragm all the way
C. Place the slide on the stage upside down
D. Reduce the amount of light on the slide
C. Place the slide on the stage upside down
A compound microscope has two magnifying lens systems. These lenses are called:
A. condenser lens and magnifying lens
B. objective lens and light source
C. ocular lens and objective lens
D. ocular lens and condenser lens
C. ocular lens and objective lens
To prevent damage to the objective lenses, what must you ALWAYS do when storing a
microscope?
A. Turn the nosepiece to the scanning objective
B. Use the coarse focus knob to raise the nosepiece to its highest position
C. Remove the light source
D. Both a and b above
D. Both a and b above
, What can you do to increase the depth of field on a specimen?
A. Adjust the amount of light with the iris diaphragm
B. Change the condenser lens to 10x
C. Switch to the high power objective
D. Turn off the light source
C. Switch to the high power objective????
What is the role of the condenser lens?
A. The initial magnification of 10x
B. To increase magnification
C. To focus light on the specimen
D. To provide light
C. To focus light on the specimen
The ability to distinguish two objects as separate is called
A. Magnification
B. Focal Level
C. Objectivity
D. Resolution
resolution
Magnification refers to the ability to
A. Resolve two objects as separate
B. Increase the visible size of a specimen
C. See objects smaller than 0.001 micrometers
D. Focus light with the condenser lens
B. Increase the visible size of a specimen
The scanning power objective allows you to see the largest total area of a specimen.
True
False
True
What percent salt solution is considered isotonic to cells?
A.
9.0%
B.
0.01%
C.
0.9%
D.
0.09%
0.9
In the Cheek Cell Tonicity experiment, you made slides of your cheek cells with three
different salt solutions. What was the purpose of the different salt solutions?
A.
To observe the nucleus of the cells
B.
To observe the movement of water
C.
To test for diffusion of starch
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