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BIOL300 Winter 2006 second midterm exam v1

BIOL300 Winter 2006 second midterm exam v1 - NAME ID...

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NAME:____________________________ ID#:_______________________________ BIOL300 Winter 2006 Second Midterm Exam Feb. 27, 2006 Instructor: Dr. Mike Chao Cal. State University San Bernardino True/False questions: 10 questions, 50 points. Multiple Choice questions: 10 questions, 70 points. Essay questions: 4 questions, 80 points. Also 20 points in bonus questions. Total point value: 200 points. Write clearly! If cannot read your handwriting, I cannot grade your exam. You will get no credit for a question if I cannot read your handwriting. 1
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NAME:____________________________ ID#:_______________________________ Part A. True/false questions (50 points total, 5 points each): Read each question carefully and completely! Some of the statements may be only partially true. Circle true or false to indicate your answer. For questions where you answer false, indicate what portion of the question is false by crossing it out, and correct it to make it a true statement. Answers without corrections or with incorrect corrections (or trivial corrections) will only receive partial credit. Examples: (True/False ) Jack and Jill went up the hill to fetch a six-pack of Bud Light . a pail of water. (full credit!) (True/False ) Jack and Jill went up the hill NOT to fetch a six pack of Bud Light. ( trivial correction; 2 points partial credit ) (True/False ) Jack and Jill went up the hill to fetch a six pack of Bud Light . Heineken. ( wrong correction; 2 points partial credit ) 1. (True/False) Molecules that are transported through a passive membrane transporter move from a low concentration to a high concentration. 2. (True/False) Transmembrane proteins with long transmembrane domains will tend to cluster in lipid rafts. 3. (True/False) Sar1 is a small G protein that recruits COPII coat proteins to form COPII vesicles. COPII coat proteins are recruited to the ER membrane by Sar1-GDP. 4. (True/False) Sec61 is a protein translocation channel on the endoplasmic reticulum membrane that can gate in two dimensions: cross-membrane and laterally. 5. (True/False) The chaperone calnexin plays an important role in the quality control of of the folding of N-linked glycosylated proteins in the Golgi body. 6. (True/False) K + ions play a major role in depolarizing the plasma membrane during an action potential. 7. (True/False) Ca 2+ influx through a voltage gated Ca 2+ channel directly triggers SNARE complex activation and vesicle fusion on the presynaptic membrane. 8. (True/False) Tubulin is a GTPase. The active site on tubulin that catalyzes the GTP hydrolysis reaction is located on the β -tubulin subunit, where the GTP substrate is bound. 9. (True/False) Gated ion channels can exist in three states: closed, open, and inactive.
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