What cofactor would be needed to carry out the

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25. What cofactor would be needed to carry out the following reaction associated with the pentose phosphate pathway? A) NAD + B) NADH C) NADP + D) NADPH E) FADH 2 26. How many QH 2 molecules are ultimately oxidized (net) in the process of reducing 2 molecules of cytochrome c ? 27. Which of the choices would be an accurate classification of the structure below? 28. Which component of the electron transport chain is actually an enzyme that functions in the TCA cycle? 29. Calculate the standard reduction potential of substance X when E is 0.4 V at 25 ° C, [X] reduced is 4 μ M and [X] oxidized is 120 μ M. Assume that n = 2. A) 0.44 V B) 0.36 V C) 0.63 V D) 0.31 V E) 0.54 V Version 3 Page 3
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30. Which of the following pairs are interconvertible? 31. In the TCA cycle, the production of fumarate represents a(n) 32. Of the TCA cycle intermediates, only oxaloacetate can serve as a gluconeogenic precursor. 33. Mannose is the C2 epimer of glucose. Which of the structures below is mannose? A) A B) B C) C D) D 34. How many cytochrome c molecules are needed to fully reduce 1 molecule of O 2 ? 35. When 2 electrons are passed through Complexes I and III, a total of ____ protons are transferred to the intermembrane space. 36. The reaction that converts glyceraldehyde-3-phosphate to 1,2-bisphosphoglycerate consumes 1 molecule of ATP. 37. Which enzyme of the pyruvate dehydrogenase complex is directly responsible for producing acetyl-CoA? A) E1 B) E2 C) E3 D) E4 38. The three irreversible reactions of glycolysis are bypassed in gluconeogenesis by which of the following enzymes? 39. How are reducing equivalents transferred from the cytosol into the mitochondrial matrix?
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