ExOldExam1fall01 - Bio s211 Fall 2001 TEST #1 Name_ SSN_...

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Fall 2001 TEST #1 Name__________________________________ SSN_______________________________ Assigned Discussion Section (time or unique #_________________________________ Write your name and SSN on the scantron sheet. Choose the BEST answer for Questions 1-20 worth 2.5 pts each. Circle this answer directly on the test and use Scantron sheet to answer Questions 1-20. Use this test to answer the remaining questions directly on the test. Turn in both Scantron and test at the completion of the exam. 1. Ammonia has the structure NH 3 . Nitrogen needs the following number of electrons to fill its valence shell a. 1 b. 2 c. 3 d. 4 e. 5 2. Select the statement that best describes a polar covalent bond. A. A hydrogen bond is one example of a polar covalent bond. B. Electron sharing is equal between the atoms. . C. Bonding between carbon and hydrogen represents a typical polar covalent bond. D. Electron sharing is unequal between the atoms. E. Many polar covalent bonds occur in hydrophobic molecules. 3. Choose the correct statement about water a. Each oxygen has a negative charge equal -1 b. Each oxygen has a partial negative charge c. Each hydrogen has a negative charge equal -1 d. Each hydrogen has a positive charge equal +1 e. Electrons are equally shared in the oxygen-hydrogen bond. 4. If the pH of a solution is decreased from 8 to 6, it means that a. the hydrogen ion concentration has decreased to 1/10 of what it was at pH 8. b. the hydrogen ion concentration has increased to 10 times of what it was at pH 8. c.. the hydrogen ion concentration has decreased to 1/100 of what it was at pH 8 d. the hydrogen ion concentration has increased to 100 times of what it was at pH 8 e . the hydrogen ion concentration has decreased by one-fourth of what it was at pH 8 5. A phospholipid bilayer is arranged with A. The fatty acid tails pointing away from water. B.
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This note was uploaded on 04/07/2008 for the course BIO 311C taught by Professor Satasivian during the Spring '08 term at University of Texas.

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ExOldExam1fall01 - Bio s211 Fall 2001 TEST #1 Name_ SSN_...

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