Old Exam 1 - Bio 311C Exam 1 September 26, 2006 Printed...

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Bio 311C Exam 1 Printed Name________________________________________ September 26, 2006 EID________________________________________________ Multiple choice: for items 1-22 (2 points each), choose ONE correct answer; enter it on this page, and also bubble it in on the scan form. For the rest of the exam, answer directly on the exam. 1.________A polar covalent bond is one in which (A) outer-shell electrons are transferred from one atom to another; (B) a positively charged particle is electrostatically attracted to a negatively charged particle; (C) outer-shell electrons are shared equally between two atoms; (D) atoms sharing electrons differ in electronegativity; (E) participating atoms differ in number of protons. 2. ________Among the bonds that can form between R groups in a protein, which of these is considered the strongest? (i.e., takes more energy to break it) (A) covalent bond; (B) hydrogen bond; (C) hydrophobic interaction; (D) ionic bond; (E) van der Waals attraction. 3________Bacteria that live in hot springs must have proteins that can withstand heat. Their proteins most likely have a high proportion of amino acids with which type of R groups? (A) polar and uncharged; (B) nonpolar; (C) negatively charged; (D) positively charged; (E) containing sulfhydryl groups. 4________Cellulose (which humans cannot digest) and starch (which humans can digest) are polysaccharides that differ most importantly (with respect to digestive enzymes) in which way? (A) the type of sugar that is the monomer; (B) the presence of amine groups on the sugar monomers; (C) the nature of the bonds between the sugars; (D) the length of the monomers (length of polysaccharide chain); (E) electrical charge differences on the sugar monomers. For questions 5-8, choose only ONE answer from A-E, the following groups of organic compounds. (A) carbohydrates; (B) lipids; (C) proteins; (D) nucleotides, nucleic acids; (E) none of these. 5________All monomers of this group contain a phosphate functional group. 6________This group includes the steroids. 7________Complex molecules in this group are NOT chains of monomers (choose from A-D). 8________Complex molecules in this group CANNOT be made by condensation (dehydration) 9________ Because water is a highly polar molecule, it (A) tends to behave as an acid; (B) has a high boiling point; (C) is useful in hydrolysis reactions; (D) easily forms ionic bonds; (E) often forms a hydration shell around nonpolar molecules. 10________On a container of shortening you notice the statement "hydrogenated vegetable oil".
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This test prep was uploaded on 03/19/2008 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas at Austin.

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Old Exam 1 - Bio 311C Exam 1 September 26, 2006 Printed...

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