BIOD 171 MODULE 3 EXAM (2025) QUESTIONS
AND VERIFIED CORRECT ANSWERS,
DISTINCTION GRADE
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academic assistance.
What is the total magnification (relative to your eye) of a sample imaged with a 60x objective and a 10x
eyepiece? Show your math - ANSWER 60 x 10 =600x total magnification
True or False: A cell that is adherent, flat (thin), and unstained is easily identified using bright field
microscopy? - ANSWER False
Adherent, flat cells are almost invisible due to the limits on both resolution and contrast
Which of the following could be seen cleraly by the unaided eye? Select all that apply
A. Protozoa with diameter of 150 μm
B. Virus with a diameter of 0.2 μm
C. Bacteria with diameter of 24 μm
D. Skin cell with diameter of 1500 μm - ANSWER A. Protozoa with diameter of 150 μm
D. Skin cell with diameter of 1500 μm
the unaided eye can on average clearly resolve objects > 100 μm
Label the following unmarked microscope components (numbered arrows) by
, matching it with the components provided (le!ers).
A. Stage
B. Fine Adjustment Knob
C. Iris Diaphragm
D. Neck
E. Condenser Lens
F. Eyepiece
G. Objective
H. Base
I. Coaxial Controls - ANSWER 1. F. Eyepiece
2. D. Neck
3. B. Fine Adjustment Knob
4. G. Objective
5. A. Stage
6. H. Base
This type of microscope utilizes ultraviolet (UV) light to illuminate stained objects - ANSWER
Flourescence
This type of microscope can provide detailed images of live cells without staining. - ANSWER Phase-
Contrast
This type of microscope is used to greatly increase the contrast between samples and background by
reflecting light off the specimen - ANSWER Dark Field
This type of microscope is capable of capturing images in multiple focal planes, rendering a specimen in
3-D - ANSWER Confocal
AND VERIFIED CORRECT ANSWERS,
DISTINCTION GRADE
Email us at for all Nursing/Medical
academic assistance.
What is the total magnification (relative to your eye) of a sample imaged with a 60x objective and a 10x
eyepiece? Show your math - ANSWER 60 x 10 =600x total magnification
True or False: A cell that is adherent, flat (thin), and unstained is easily identified using bright field
microscopy? - ANSWER False
Adherent, flat cells are almost invisible due to the limits on both resolution and contrast
Which of the following could be seen cleraly by the unaided eye? Select all that apply
A. Protozoa with diameter of 150 μm
B. Virus with a diameter of 0.2 μm
C. Bacteria with diameter of 24 μm
D. Skin cell with diameter of 1500 μm - ANSWER A. Protozoa with diameter of 150 μm
D. Skin cell with diameter of 1500 μm
the unaided eye can on average clearly resolve objects > 100 μm
Label the following unmarked microscope components (numbered arrows) by
, matching it with the components provided (le!ers).
A. Stage
B. Fine Adjustment Knob
C. Iris Diaphragm
D. Neck
E. Condenser Lens
F. Eyepiece
G. Objective
H. Base
I. Coaxial Controls - ANSWER 1. F. Eyepiece
2. D. Neck
3. B. Fine Adjustment Knob
4. G. Objective
5. A. Stage
6. H. Base
This type of microscope utilizes ultraviolet (UV) light to illuminate stained objects - ANSWER
Flourescence
This type of microscope can provide detailed images of live cells without staining. - ANSWER Phase-
Contrast
This type of microscope is used to greatly increase the contrast between samples and background by
reflecting light off the specimen - ANSWER Dark Field
This type of microscope is capable of capturing images in multiple focal planes, rendering a specimen in
3-D - ANSWER Confocal
