Exam1_2005_10amAns1_

Exam1_2005_10amAns1_ - BISC 220 First hourly examination 7...

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BISC 220 First hourly examination 7 February 2005 Please circle your TA's initials: SB AC MC XLiang XLiu JLui JLu CP HP KR JS YingW YuanYuanW JW Name___________________________________ 10 AM EXAMINATION ID Number_____________________ This examination has 6 pages and 33 questions. Be sure you have a complete examination. Please put your name and SSN on the top of each page. For each of the following questions choose the one answer that best satisfies the conditions of the question. The point value of the questions is given in the examination. Remember to use your time wisely during the examination period. Good luck from all your teaching staff. 1 Points this page: ______ The following 29 multiple choice questions are worth 3 points each. Please CLEARLY write your answer in the left hand margin box. 1. Recent research suggests that side effects from Ritalin, the drug used to treat attention deficit disorder, may be caused by contamination of enantiomers, or molecules that a. have identical three-dimensional shapes. b. are mirror images of one another. c. lack an asymmetric carbon. d. differ in the location of their double bonds. e. differ in their electrical charge. 2. All of the following statements are representative of the second law of thermodynamics except a. energy transfers are always accompanied by some loss. b. heat energy represents lost energy to most systems. c. systems tend to rearrange themselves toward greater entropy. d. highly organized systems require energy for their maintenance. e. every time energy changes form, there is a decrease in entropy. 3. Zinc, an essential trace element, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as a(n) a. competitive inhibitor of the enzyme. b. noncompetitive inhibitor of the enzyme. c. allosteric activator of the enzyme. d. cofactor necessary for enzyme activity. e. coenzyme derived from a vitamin. 4. A given solution is found to contain 0.00000001 mol of hydrogen ions (H + ) per liter. Which of the following best describes this solution? a. acidic: H + acceptor b. basic: H + acceptor c. acidic: H + donor d. basic: H + donor e. neutral 5. Which of the following pairs is mismatched? a. nucleolus-ribosomal RNA b. nucleus-DNA replication c. lysosome-protein synthesis d. cell membrane-lipid bilayer e. cytoskeleton-microtubules 6. Which of the following are nitrogen bases of the purine type? a. guanine and glucose b. cystine and sucrose c. thymine and cytosine d. ribose and deoxyribose e. adenine and guanine
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Please circle your TA's initials: SB AC MC XLiang XLiu JLui JLu CP HP KR JS YingW YuanYuanW JW Name___________________________________ 2 Points this page: ______ 7. The transfer of free energy from catabolic pathways to anabolic pathways is best called a. feedback regulation. b. bioenergetics. c. energy coupling.
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This note was uploaded on 05/03/2010 for the course BISC 220L taught by Professor Herrera,mcclure during the Spring '07 term at USC.

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Exam1_2005_10amAns1_ - BISC 220 First hourly examination 7...

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