answers 3 Biochemestry

answers 3 Biochemestry - name _ page 1 Student # _ Exam III...

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name ___________________________ page 1 Student # ________________ Exam III – Schwacha 100 points total 11/18/08 1. Print your name on each page 2. Read each question carefully 3. Answer each question in ink only and write legibly 4. Remember to sign the class list when you turn in your exam. 5. Use a sheet of blank paper (at rear to exam) to cover your answers as you work. 6. Good luck! 7. Have a good Thanksgiving! Calculators are NOT allowed or required. __________________________________________________________________ Physical constants that may or may not be helpful 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 o C = 298 K ln10 = 2.3; log 10=1; log 1 = 0 speed of light in a vacuum = 299,792,458 m/sec The gravitational constant G = 6.6742* 10 -11 m 3 s -2 kg -1 The cube root of 42 = 3.47
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name ___________________________ page 2 Multiple choice – circle the BEST answer (2 points each) 1. Almost all of the oxygen (O 2 ) one consumes in breathing is converted to: (2 pts) A) acetyl-CoA. B) carbon dioxide (CO 2 ). C) carbon monoxide and then to carbon dioxide. D) none of the above. E) water. 2. During oxidative phosphorylation, the proton motive force that is generated by electron transport is used to: (2 pts) A) create a pore in the inner mitochondrial membrane. B) generate the substrates (ADP and P i ) for the ATP synthase. C) induce a conformational change in the ATP synthase. D) oxidize NADH to NAD + . E) reduce O 2 to H 2 O. 3. The relative concentrations of ATP and ADP control the cellular rates of: (2 pts) A) glycolysis. B) oxidative phosphorylation. C) pyruvate oxidation. D) the citric acid cycle. E) all of the above. 4. In what order do the following five steps occur in the photochemical reaction centers? (2 pts) 1) Excitation of the chlorophyll a molecule at the reaction center 2) Replacement of the electron in the reaction center chlorophyll 3) Light excitation of antenna chlorophyll molecule 4) Passage of excited electron to electron-transfer chain 5) Exiton transfer to neighboring chlorophyll A) 1-2-3-4-5 B) 3-2-5-4-1 C) 3-5-1-4-2 D) 4-2-3-5-1 E) 5-4-3-2-1
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name ___________________________ page 3 5. Photosynthetic phosphorylation and oxidative phosphorylation appear to be generally similar processes, both consisting of ATP synthesis coupled to the transfer of electrons along an electron carrier chain. Which of the following is not true of both processes? (2 pts) A) Both contain cytochromes and flavins in their electron carrier chains. B) Both processes are associated with membranous elements of the cell. C) Both use oxygen as a terminal electron acceptor. 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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answers 3 Biochemestry - name _ page 1 Student # _ Exam III...

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