Exam01_2009_APV_Keyv2

Exam01_2009_APV_Keyv2 - Name Student(not SS Biological...

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Name_________________________ Student# (not SS#)_________________________ Biological Sciences 1000 – Biochemistry EXAM I September 23, 2008 1. Read each question carefully. 2. Print your name on each page. 3. Write in ink only & write legibly. (If I can’t read it, I can’t grade it.) 4. Remember to sign the class list when you turn in your exam. Your signature indicates your attendence & adherance to the University standards of ethical conduct. 5. Use a sheet of blank paper (last page this exam) to cover your answers as you work. 6. All cell phones, personal digital assistants, Game Boys, iPods & all other electronic devices will be switched off & put away during the sitting of our examination. Calculators are NOT allowed. Physical Constants that may or may not be helpful today. Boltzmann constant, k = 1.381 x 10 -23 J/K Avogadro’s number, N = 6.022 x 10 23 mol -1 Faraday’s constant, F = 96.48 kJ V -1 mol -1 Gas constant, R = 8.315 J/mol K 25 ° C = 298 K log 10 = 1; log 1 = 0, log 100 = 2
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NAME:______________________________ 2 Part One: Multiple Choice Indicate the BEST answer by CIRCLING the item you select (2 points each) : 1) In a bacterial cell, the DNA is in the: A) cell envelope. B) cell membrane. C) nucleus. D) mitochondria E) None of the above 2) The three-dimensional structure of macromolecules is formed and maintained primarily through noncovalent interactions. Which one of the following is not considered a noncovalent interaction? A) carbon-carbon bonds B) hydrogen bonds C) hydrophobic interactions D) ionic interactions E) van der Waals interactions 3) What functional groups are present on this molecule? A) Ether and aldehyde B) Hydroxyl and aldehyde C) Hydroxyl and carboxylic acid D) Hydroxyl and ester E) Hydroxyl and ketone 4) Stereoisomers that are nonsuperimposable mirror images of each other are known as: A) anomers. B) cis-trans isomers. C) diastereoisomers. D) enantiomers. E) geometric isomers. 5) Which of these statements about hydrogen bonds is not true?
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NAME:______________________________ 3 A) Hydrogen bonds account for the anomalously high boiling point of water. B) In liquid water, the average water molecule forms hydrogen bonds with three to four other water molecules. C) Individual hydrogen bonds are much weaker than covalent bonds. D) Individual hydrogen bonds in liquid water exist for many seconds and sometimes for minutes. E) The strength of a hydrogen bond depends on the linearity of the three atoms involved in the bond. 6) Enzymes are biological catalysts that enhance the rate of a reaction by: A) decreasing the activation energy. B) decreasing the amount of free energy released. C) increasing the activation energy. D)
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This note was uploaded on 04/03/2011 for the course BIOSCI 1000 taught by Professor Bledsoe during the Fall '08 term at Pittsburgh.

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Exam01_2009_APV_Keyv2 - Name Student(not SS Biological...

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