UNE Biochemistry Final 100-215| 113 Questions| With Complete Solutions

If unregulated, which of the following pairs of enzymes would represent a futile cycle? correct answer: Fructose-1,6-bisphosphatase and phosphofructokinase 1 Ethanol metabolism correct answer: Increases the ratio of NADH/NAD+ The first step in ethanol metabolism is in the cytosol and generates which of the following products? correct answer: Acetaldehyde Acetate generated from ethanol metabolism can be directly converted to _____________________ which can be oxidized in the TCA cycle. correct answer: Acetyl CoA Increase in ethanol consumption leads to an increase in the ratio of NADH/NAD+. This promotes the conversion of pyruvate to which fo the following compounds? correct answer: Lactate The oxidation of ethanol increases the ratio of NADH/ NAD in both the mitochondria and the cytosol. This leads to the inhibition of which of the following enzymes in the TCA cycle? correct answer: Isocitrate dehydrogenase Several friends went out Saturday evening to celebrate an exam. They skipped dinner and decided to head straight to the bar. The next morning one of the individuals was found laying unconscious at the bottom of the stairs. He was rushed to the emergency department and blood glucose levels of 30mg/ dL (normal range 100-120mg/ dL). At the time of presentation, which of the following would be consistent with this individuals signs and symptoms (when compared to a normal individual)?