Ch6 Test Bank - Ch6 Test Bank Multiple Choice Identify the...

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Ch6 Test Bank Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. What limits the resolving power of a light microscope? a. the type of lens used to magnify the object under study b. the shortest wavelength of light used to illuminate the specimen c. the type of lens that focuses a beam of electrons through the specimen d. the type of heavy metal or dye that is used to stain the specimen e. the ratio of an object's image to its real size ____ 2. When biologists wish to study the internal ultrastructure of cells, they most likely would use a. a light microscope. b. a scanning electron microscope. c. a transmission electronic microscope. d. A and C only e. A, B, and C ____ 3. The advantage of light microscopy over electron microscopy is that ____ 4. A primary objective of cell fractionation is to ____ 5. In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is ____ 6. Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge? a. ribosomes, nucleus, mitochondria b. chloroplasts, ribosomes, vacuoles c. nucleus, ribosomes, chloroplasts d. vacuoles, ribosomes, nucleus e. nucleus, mitochondria, ribosomes ____ 7. Quantum dots are small (15-30 nm diameter), bright particles visible using light microscopy. If the dots can be specifically bound to individual proteins on a plasma membrane of a cell, which of the following correctly describes the advantage of using quantum dots in examining proteins?
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