Midterm2_D_key

Midterm2_D_key - BIS 104 Form D Instructions: Midterm 2...

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BIS 104 Form D Midterm 2 March 4, 2011 1 Instructions: Be sure to mark the version of your test on the scantron. This is FORM D. There are 9 pages and 33 questions to this exam. Each question is worth 3 points, and you get 1 point for filling in your student ID correctly. DO NOT OPEN UNTIL INSTRUCTED. The exam will end promptly at 9:50 am. If you think there is an error in the exam, notify the proctors. The proctors can’t help you define terms or clarify wording. Always pick the best answer. For each question there is one correct answer. Fill out your name and student identification number on the blue scantron Form with a #2 pencil. Fill in your answers on the scantron form with a #2 pencil. For each question only choose one answer (the best answer) and fill in your selection clearly and completely. If you change an answer, make you sure you erase it completely.
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BIS 104 Form D Midterm 2 March 4, 2011 2 1. In the rigor state, a motor is attached to a cytoskeletal element. Compare and contrast the rigor state of Myosin II to conventional kinesin-1. A. Myosin is in rigor when no nucleotide is present and kinesin is in rigor when non- hydrolyzable ATP is present. B. Both Myosin and kinesin are in rigor when no nucleotide is present. C. Myosin is in rigor with non-hydrolyzable ATP is present and kinesin is in rigor with non-hydrolyzable GTP. D. Myosin is in rigor when no nucleotide is present and kinesin is in rigor when non- hydrolyzable GTP is in the tubulin E. Myosin is in rigor with non-hydrolyzable ATP is present and kinesin is in rigor with no nucleotide. 2. (Warning--this is a different cell type and different data set than that for the clicker question from class) You briefly (about 15 minutes) label tissue culture cells with radioactive H 3 thymidine. You then look at time points at later times. At each time point, you collect the cells in mitosis and quantitate the percentage of cells that are labeled with radioactive thymidine (see the graph). What is the length of G2 in these cells? A. About 4 hour B. About 10 hours C. About 15 hours D. About 24 hours E. About 34 hours 0 3 6 9 12 15 18 21 24 27 30 33 35 Time in hours after H 3 thymidine pulse %ofM‐phasecellsthatare labeledwithH 3 Thymidine
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BIS 104 Form D Midterm 2 March 4, 2011 3 3. You return from an expedition to the Amazon with a suitcase of compounds from rare plants. When you inject these compounds into cells, endocytosis of clathrin-coated vesicles is blocked. You determine that the compound blocks the ATPase activity of a motor. You hypothesize that this compound disrupts the activity of the motor_________. A. Myosin II B. Dynein C. Kinesin D. Myosin VI E. Myosin V 4. The addition of colchicine to microtubules causes which of the following? A. curved protofilaments, increased rescue frequency
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This note was uploaded on 04/18/2011 for the course BIS 104 taught by Professor Scholey during the Spring '08 term at UC Davis.

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Midterm2_D_key - BIS 104 Form D Instructions: Midterm 2...

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