Practice Exam 1 - 1. What structure does light pass through...

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1. What structure does light pass through after leaving the condenser in a compound light microscope? A) The objective lens B) The ocular lens C) The illuminator D) The specimen 2. Further opening the diaphragm of a microscope does which of the following? A) Focuses the light on the specimen B) Increases the amount of light passing through the specimen C) Changes the wavelength of light entering the objective lens D) Increases the magnification of the image 3. When focus is achieved on a compound microscope and the objective lens is switched, the image stays in focus. This property is called: A) Parfocal B) Resolution C) Magnification D) Refraction 4. A paramecium is viewed under a light microscope using a 10X high, dry objective lens and a 10X ocular lens. By changing to a 40X objective and switching to a 15X ocular lens, the total magnification of the image has been increased by: A) 2-fold B) 4-fold C) 6-fold D) 10-fold 5. Which of the following statements about light microscopy are true? A) Light microscopy always relies on fixation and staining. B) Light microscopy never uses light outside the visible spectrum. C) Light microscopy often relies on oil immersion to improve resolution. D) Light microscopes always consist of at least two lenses.
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6. Living, unstained cells and organisms can be observed best using: A) Brightfield microscopy B) Transmission electron microscopy C) Phase contrast microscopy D) Scanning electron microscopy 7. Which of the following sets of numbers are most likely values for resolution and magnification? A) 1000X resolution, 1.4 µm magnification B) 400X resolution, 1.6 nm magnification C) 300,000X magnification, 0.8 nm resolution D) 100,000X magnification, 0.6 nm resolution 8. Which of the following is one advantage of chemical fixation over heat fixation? A) Chemical fixation does not kill the cells.
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Practice Exam 1 - 1. What structure does light pass through...

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