06fexam1 - Biology 203/402 Name_ TA's _ First Examination...

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Biology 203/402 Name_______________ First Examination Fall, 2006 TA’s _______________ Multiple Choice 1. Total magnification is determined by _______________. a. adding the magnification of the ocular and the objective lenses b. the power of the objective lens only c. multiplying the magnification of the ocular and the objective lenses 2. The proper position of the objective lens when storing the microscope is to place the ______________ lens in the downward facing position. a. 10x b. 40x c. 100x 3. Objective A of your microscope is stamped with a numerical aperture of 1.25, and objective B has a numerical aperture of 0.25. These are the two most frequently used objectives. Objective A is likely the _______________ objective. Hint: RP = λ/2NA. a. 10 x b. 100x 4. When viewing a specimen with the oil immersion objective, the best resolution is usually found when the iris diaphragm lever is ____________. a. fully open b. in the middle position c. fully closed 5. A parfocal microscope ____________________. a. allows the user to adjust the width of the eyepieces. b. allows the user to adjust for different lens correction in each eye. c. allows the user to switch between objectives with little additional focusing required. d. allows the user to look through the microscope while wearing glasses. 6. Oil has nearly the same refractive index as ____________. a. glass b. air c. water True (a) or False (b) 7. T F Aseptic technique is designed to protect the culture from contamination, but is not designed to protect the worker from infection. 8. T F Laying test tube caps on the bench is considered acceptable aseptic technique. 9. T F When using an automatic pipetter, draw up the liquid by depressing to the second stop, and dispense the liquid by depressing to the first stop. 10.
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This test prep was uploaded on 04/17/2008 for the course BIOL 402 taught by Professor Faurot during the Spring '08 term at Kansas.

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06fexam1 - Biology 203/402 Name_ TA's _ First Examination...

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