ex4spr07form1expl

ex4spr07form1expl - Fourth exam, spring 07 page 1...

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Fourth exam, spring 07 page BIO201C/Hon—Janicke—Spring 2007 If you have not already done so, IMMEDIATELY fill in the bubbles on the back of the answer sheet for (1) your name (LAST NAME FIRST) (2) 8-digit person number, (3) seat number (4) FORM 2 (under “GRADE or EDUCATION”) On the front of your scantron on the top line, sign your name and the code word “good luck” Do it now, because when the exam is over, you must stop work when told and will be given no extra time to do ANYTHING. You will be assigned a score of ZERO if you hand in a scantron with no name on it, fail to fill in your form number, use notes of any kind, or copy another student’s work. Other procedural errors in your scantron or in exam rules (such as hats, calculators of your own, cell phones heard or seen, or talking) will result in deduction of 5 points (if cheating is NOT suspected). Be sure erasures are complete. You may ask for a new scantron if you’ve ruined yours. CHOOSE ONE AND ONLY ONE ANSWER PER QUESTION. 1. From left to right, what is the volume set on each of these micropipettors? A. 22 ul, 220 ul, 2200ul B. 22 ul, 2.2 ml, 22 ml C. 22 ul, 22 ul, 22ul D. 2200 ul, 220 ul, 22ul E. 220 ul, 22ul, 2.2ul 2. To zero a spectrophotometer, place (a) into the sample chamber and set (b) to zero. (a) (b) A everything in the solution except your chromophore of interest %T B your chromophore of interest absorbance C your chromophore of interest %T D everything in the solution except your chromophore of interest absorbance E empty cuvette absorbance 0 2 2 0 2 2 0 2 2 p 1000 p 20 p 200 1
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Fourth exam, spring 07 page 3. If 10 ml of a 10 mM solution of DCIP is mixed with 1 ul of water, the absorbance of the DCIP should A. be cut by 1/10 B. be increased ten fold C. remain essentially the same D. be reduced by a factor of 100,000 E. be increased by a factor of 100 fold 4. When a homogenate is centrifuged in a buffer having a density less than that of all the particles, the particles found at the bottom of tube after 10 min A. are less dense than anything still in solution B. have a greater charge-to-mass ratio than particles in the supernatant C. have density equal to that of the medium D. are larger than the particles in the supernatant E. are smaller than the particles in the supernatant 5. Which of the following light microscope objectives would provide the most detailed image of a cell? A. 10x, NA 0.3 B. 20X, NA 0.75 C. 40X, NA 1.0 D. 60X, NA 1.4 E. 100X, NA 1.0 6. Assume the illustration above is of a metaphase chromosome from a skin cell. The labels indicate: A B C A Centromere Sister chromatids Kinetochore B Karyotype Homologous chromosomes Centrosome C Secondary constricton Sister chromtids Centromere D Kinetochore Sister kinetochores Karyotype E Kinetochore Homologous chromsomes Secondary constriction 7. Products of the light reactions of
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This note was uploaded on 04/08/2008 for the course BIO 201 taught by Professor Janicke during the Spring '08 term at SUNY Buffalo.

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ex4spr07form1expl - Fourth exam, spring 07 page 1...

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