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practice questions_Exam3 - 7. ATP synthesis by complex V in...

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7. ATP synthesis by complex V in oxidative phosphorylation system a. cytosol b. mitochondria intermembrane space c. mitochondria matix (Questions 8 – 9) For each of the conditions below, predict the state of oxidation of electron carriers such as ubiquinone, cytochromes b, c and c1 in oxidative phosphorylation system 8. Abundant NADH, but O 2 exhausted a. all carriers reduced b. all carriers oxidized 9. Abundant O 2 , but NADH exhausted a. all carriers reduced b. all carriers oxidized 10.NADH is transported via transporters directly to the mitochondria to transfer electron to ubiquinone a. True b. False 23. Which of the following can be transported in and out of mitochondria? a. Oxaloacetate and fumarate b. Fumarate and malate c. Pyruvate and Oxaloacetate d. Citrate and oxaloacetate e. Pyruvate and citrate
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30. Dinitrophenol is a compound which can diffuse through a lipid bilayer (membrane), carrying a proton with it. What would the effect of adding dinitrophenol to mitochondria be on the P:O ratio of oxidative phosphorylation? a. Greater P:O ratio b. Lower P:O ratio c. Same P:O ratio
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34. All of the following prosthetic groups act as redox centers in Complex I EXCEPT : a. FMN b. Ubiquinone c. Iron-sulfur clusters d. Heme 35. The reactions that occur in complex IV include which of the following: a. cytochrome c transports electrons from complex III to complex IV b. 4 protons are pumped to the imtermembrane space c. The electrons are accepted by molecular oxygen d. A and B e. B and C f. A and C g. A, B and C 36. Arrange the following from the smallest to the largest redox potential (most negative first): 1. pyruvate/lactate 2. O 2 /H 2 O 3. Cyt a (Fe +3 )/Cyt a (Fe +2 ) 4. FAD/FADH 2 a. 1,2,3,4 b. 4,3,1,2 c. 1,4,3,2 d. 1,3,4,2 e. None of the above 38. Oxidative phosphorylation is: a. A chemical process which directly synthesizes ATP b. A single enzymatic reaction that utilizes 2 transferred electrons to produce ATP c. Indirect process which utilizes H + gradient to drive ATP synthesis
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d. Phosphorylation of mitochondrial membrane protein to produce ATP 39. The pumping of protons across the inner mitochondrial membrane:
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This note was uploaded on 08/31/2009 for the course CH 369 taught by Professor Kbrowning during the Spring '07 term at University of Texas at Austin.

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practice questions_Exam3 - 7. ATP synthesis by complex V in...

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