Fall 2009 Exam 3 - NAME: EID: SIGNATURE: BIO 311C, FALL...

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NAME: EID: SIGNATURE: BIO 311C, FALL 2009, EXAM THREE: VERSION A On the scantron, please bubble in your last name and first name. Also bubble in your EID in the ‘Identification’ section. Indicate the version of the exam you are taking (A or B) in the ‘Test Form’ section. Each multiple choice question is worth 3 points. There are 20 multiple choice questions (for a total of 60 points possible). There are six matching/essay questions. They range in value from five points to 10 points each (for a total of 40 points possible). You have 50 minutes to complete this exam. Please bring an ID with you as you turn in your exam. 1) Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle? a) H 2 O and O 2 b) Electrons and H+ c) ATP and NADPH d) CO 2 and glucose e) ADP, Pi, and NADP+ 2) Why does the oxidation of organic compounds by oxygen release free energy? a) The covalent bonds in organic molecules are higher energy bonds than those in water and carbon dioxide. b) The electrons have a higher potential energy when associated with water and CO 2 than they do in organic compounds. c) Electrons are being moved from atoms that have a lower affinity for electrons (such as C) to atoms with a higher affinity for electrons (such as O). d) The oxidation of organic compounds can be used to make ATP. e) The covalent bond in O 2 is unstable and easily broken by electrons from organic molecules. 3) Which statement describes the functioning of photosystem II? a) The P680 chlorophyll donates a pair of protons to NADPH, which is thus converted to NADP+. b) The splitting of water yields molecular carbon dioxide as a by-product. c) The electron vacancies in P680+ are filled by electrons derived from water. d) The excitation is passed along to a molecule of P700 chlorophyll in the photosynthetic unit. e) Light energy excites electrons in the electron transport chain in a photosynthetic unit. 4) Once the pattern found after one round of replication was observed, Meselson and Stahl could be confident of which of the following conclusions? a) Replication is not semi-conservative. b) Replication is not dispersive. c) Replication is not conservative. d) Replication is neither dispersive nor conservative. e) Replication is semi-conservative. 5) Which of the following best describes the addition of nucleotides to a growing DNA chain? a) A nucleoside diphosphate is added to the 5' end of the DNA, releasing a molecule of phosphate. b) A nucleoside triphosphate is added to the 5' end of the DNA, releasing a molecule of pyrophosphate. c)
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This note was uploaded on 12/13/2011 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas at Austin.

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Fall 2009 Exam 3 - NAME: EID: SIGNATURE: BIO 311C, FALL...

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