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key_exam1bf08_sml - BIOLOGY 2A UCD FALL 2008 EXAM 1B...

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B IOLOGY 2 A E XAM 1 B UCD F ALL 2008 G ERHART S TUDENT N AME ____________________KEY__________________________________ ID _____________________________________________________________________ Instructions (4 points): Fill in your name and student ID number on the scantron and the first and last pages of your exam booklet . Be certain that the bubbles of the scantron are filled in with your ID number and the correct version of your exam (found at the end of the Multiple Choice questions). Mark your scantron! Mark the last page (multiformat page) in PEN (answers recorded in pencil can not be re- submitted for re-grading). Tear off the last page and turn it in separately from the scantron. B EST OF L UCK ON THE E XAM ! Scoring: Multiple choice (37 questions @ 2 points each) = 74 points + Multi-format page (22 points) + following directions (4 pts) __________________________________________________ = 100 points possible
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Choose the best answer for each question. Mark more than one answer ONLY when SPECIFICALLY told to do so in the question. 1. In the last redox reaction of the electron transport chain, there is a large energy drop as the electrons are transferred to oxygen. This step is not coupled to any sort of work. Why might ‘wasting’ energy in this large exergonic step be favorable for the cell? A. It can’t be favorable – it’s just that no cell has yet found a way to capture this lost energy. B. The large exergonic step can ‘pull’ electrons down the electron transport chain. C. The large exergonic step can ‘push’ the synthesis of sugars. D. The large exergonic step can ‘push’ the synthesis of ATP. E. Both C and D are correct. 2. If a reaction is spontaneous, which of the following statements is true? A. The products have lower entropy (more order). B. The products have lower potential energy. C. Energy must be added constantly for the reaction to proceed. D. The reaction proceeds quickly. E. At equilibrium, the concentration of reactants is higher than of products. 3. How does one amino acid differ from another? A. the location of the carboxyl group (-COOH) B. the location of the amino group (-NH2) C. the composition of its side chain, or R-group D. in ability to form peptide bonds E. Both A and B are correct 4. What is a transition state? A. The complex formed as covalent bonds are being broken and reformed during a reaction. B. The location on an enzyme where a reaction is catalyzed. C. An interaction between reactants that occurs at high temperatures. D. The shape taken by an enzyme when interacting with its substrate. E. The shape that a folding protein takes on before reaching its final, stable shape. 5. Which new idea earned Peter Mitchell the Nobel Prize for his chemiosmotic hypothesis? A.
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This note was uploaded on 02/03/2010 for the course BIS 2A taught by Professor Grossberg during the Spring '08 term at UC Davis.

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key_exam1bf08_sml - BIOLOGY 2A UCD FALL 2008 EXAM 1B...

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