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BIOD 171 MODULE 3 SAMPLE EXAM QUESTIONS WITH CORRECT ANSWERS

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What is the total magnification on (relative to your eye) of a sample imaged with a 60x objective and a 10x eyepiece? Show your math. - 60x objective x 10x ocular = 600x magnification True or False: Staining is often required to image a cell that is adherent and flat (thin). - True Adherent, flat and unstained cells are almost invisible due to the limits on both resolution and contrast. Therefore, cell staining is often required to adequately image the sample. True or False: A cell that is adherent, flat (thin), and unstained is easily identified using bright field microscopy - False: Adherent, flat cells are almost invisible due to the limits on both resolution and contrast Which of the following could be seen clearly by the unaided eye? Select all that apply. A. Bacteria with diameter of 24 μm B. Protozoa with diameter of 150 μm C. Virus with a diameter of 0.2 μm D. Skin cell with diameter of 1500 μm - B. Protozoa with diameter of 150 μm D. Skin cell with diameter of 1500 μm

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BIOD 171 MODULE 3 SAMPLE EXAM QUESTIONS
WITH CORRECT ANSWERS




What is the total magnification on (relative to your eye) of a sample imaged with a
60x objective and a 10x eyepiece? Show your math. - ✅✅60x objective x 10x
ocular = 600x magnification



True or False: Staining is often required to image a cell that is adherent and flat
(thin). - ✅✅True



Adherent, flat and unstained cells are almost invisible due to the limits on both

resolution and contrast. Therefore, cell staining is often required to adequately
image

the sample.



True or False: A cell that is adherent, flat (thin), and unstained is easily identified
using bright field microscopy - ✅✅False: Adherent, flat cells are almost
invisible due to the limits on both resolution and contrast



Which of the following could be seen clearly by the unaided eye? Select all that
apply.

, A. Bacteria with diameter of 24 μm

B. Protozoa with diameter of 150 μm

C. Virus with a diameter of 0.2 μm

D. Skin cell with diameter of 1500 μm - ✅✅B. 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



2. Which of the following could NOT be seen clearly by the unaided eye? Select
all that apply.



A. Bacteria with diameter of 24 μm

B. Protozoa with diameter of 150 μm

C. Virus with a diameter of 0.2 μm

D. Skin cell with diameter of 1500 μm - ✅✅A. Bacteria with diameter of 24 μm

C. Virus with a diameter of 0.2 μm



The unaided eye can, on average, clearly resolve objects > 100 μm

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