Chapter 3 โ The Invisible World: Microscopy
Your Post-Lab Quiz will be 15 questions chosen from this Question Bank.
_____ 1. A compound microscope has _____ set(s) of lenses.
A. one B. two C. three D. four
_____ 2. When looking through the __________ microscope, the specimen appears as a dark object
against a light background.
A. fluorescence B. dark field C. bright field D. electron
_____ 3. Which microscope provides three-dimensional images?
A. Scanning electron microscope (SEM) C. dark field microscope
B. Nomarski microscope D. fluorescence microscope
_____ 4. What is the approximate magnification of the low-power objective?
A. 4X B. 10X C. 40X D. 100X
_____ 5. The microscope platform upon which specimen slides are placed is called the ________.
A. shelf B. arm C. base D. stage
_____ 6. Which of the following microscope objectives is used for final and fine focusing?
A. scanning B. low-power C. high-power D. oil-immersion
_____ 7. The distance between the objective lens and the specimen is called the ______ distance.
A. working B. viewing C. objective D. functional
_____ 8. Which of the following components of the compound microscope is used to focus light on the
specimen?
A. draw tube B. illuminator C. iris diaphragm D. condenser.
_____ 9. What is the magnification of the transmission electron microscope (TEM)?
A. 10โ1,500X B. 10โ3,000X C. 10โ500,000X D. 200โ1,000,000X
_____ 10. The scanning electron microscope (SEM) is useful for studying which of the following?
A. The surface features of specimens.
B. The finer details of the internal structures of organisms.
C. The ultrastructure of cells.
D. Certain biochemicals.
_____ 11. To change the amount of light entering the objective lens, you would adjust the ________.
A. nosepiece B. condenser C. iris diaphragm D. light source
_____ 12. While looking at a specimen under a microscope, you move the slide to the right. In which
direction does the image move?
A. to the right B. to the left C. up D. down
