BIS1st_midtermGERHART

BIS1st_midtermGERHART - 1 B IOLOGY 2 A E XAM 1 B UCD S...

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Unformatted text preview: 1 B IOLOGY 2 A E XAM 1 B UCD S PRING 2008 G ERHART S TUDENT N AME __________________________________________________________ ID _____________________________________________________________________ Instructions (3 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 in pencil not eligible 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 (36 questions @ 2 points each) = 72 points + Multi-format page (25 points) + following directions (3 pts) __________________________________________________ = 100 points possible 2 Choose the best answer to each of the following questions. If two answers are asked for, mark BOTH correct responses to get credit. Choose two answers ONLY when specifically asked to do so. 1. Why are ATP and ADP considered high energy molecules, while AMP is not? A. ATP and ADP contain phosphates, while AMP does not B. ATP and ADP contain ribose, while AMP does not C. ATP and ADP are modified nucleotides, while AMP is not D. ATP and ADP contain phosphates bonded to other phosphates, while AMP does not E. ATP and ADP can be hydrolyzed while AMP cannot. 2. In what sense might it be said that life runs on electricity? A. Redox reactions involve movement of electrons (and protons) from a donor to an acceptor – all energy is derived from these redox reactions. B. Each cell contains energy which is released over its lifespan (like a battery) C. The earth’s magnetism generates electricity within cells that move across its surface – as in a generator D. All cells make ATP by use of the ATPase powered by proton flow across a membrane. E. All cells make ATP by transporting protons from inside to outside of the cell. 3. What has been reduced (has gained electrons) in the equation shown below? H 2 S + CO 2 Æ S° + (CH2O) n A. H 2 S B. CO 2 C. S° D. (CH2O) n E. None of the above 4. When electrons follow a cyclic pathway in a photosystem, which of the following are produced? A. ATP B. NAD(P)H C. An oxidized donor molecule, such as O 2 or S° D. B and C only E. All of the choices are correct 5. Life involves redox reactions. What internal electron acceptor is involved in most of these reactions? A. ATP B. NAD+ C. The proton-motive force D. Pyruvate E. Chlorophyll 3 6. A lucky little microorganism living on early Earth has the ability to ask you for advice. There are several possible fuels in the environment and the microorganism is confused about which to use. Use your understanding of redox chemistry to determine which redox couples the microorganism should use (and in which order) to harvest the most energy possible....
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BIS1st_midtermGERHART - 1 B IOLOGY 2 A E XAM 1 B UCD S...

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