What protein dysfunction liberates the oxygen free radicals associated with aging? Question 64 options: pyruvate dehydrogenase phosphofructokinase succinyl oxidase cytochrome oxidase beta-oxidase synthase
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The question is asking about a specific protein dysfunction that leads to the release of oxygen free radicals, which are associated with the aging process. Show more…
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E7. Which electron carrier or prosthetic group would NOT function after site-directed mutagenesis substituted Pro for Cys in succinate dehydrogenase? A) Cytochrome c B) Iron-sulfur center C) Flavin adenine dinucleotide D) Ubiquinone E) FMN E8. Why are reactive oxygen species (ROS) generated? A) Molecular oxygen recombines with hydrogen to produce dihydrogen oxide. B) Stray electrons bind to oxygen creating a free radical oxygen species. C) There are high ADP levels. D) There is a high NAD+/NADH ratio. E) Transfer of a H+ across the inner mitochondrial membrane is uncoupled from ATP synthase. E9. Suppose that there is a dramatic increase in the work done by a cell. You would expect an increase in all of the following EXCEPT: A) the utilization of oxygen; B) the ratio of ATP to ADP in the cell; C) the rate of utilization of ADP by ATP synthase; D) the entrance of H+ into the mitochondria through ATP synthase; E) the pumping of H+ out of the mitochondria by the electron transport chain. E10. Which of the following pairs would represent a futile cycle if they were both activated at the same time? A) Glycolysis and glycogenolysis. B) Glycolysis and glycogen synthesis. C) Gluconeogenesis and glycogenolysis. D) Gluconeogenesis and glycolysis. E) Gluconeogenesis and glycogen synthesis.
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