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- Radiolabeling with 14C-Glutamate Describe the labeling pattern that would result from the introduction into the TCA cycle of glutamate labeled at Cy with 14C.Phosphoenolpyruvate serves as the precursor of the glycerol backbone during TAG biosynthesis. O True O FalseCitrate Synthase exists as a dimer but can catalyze the formation of only 1 citrate from Acetyl-CoA + Oxaloacetate at a time O True O False
- Arrange the steps of breakdown of oleic acid (pictured below) in the correct order. 1 2 3 4 5 activation by acyl-CoAsynthe ✓ [Choose ] one cycle ofß-oxidationbeginning at the enoyl-CoAhydratasestep three cycles ofẞ-oxidation five cycles ofß-oxidation activation by acyl-CoAsynthetase enoyl-CoAisomeraseactivity enoyl-CoAisomeraseactivity V one cycle ofß-oxidationbegini V five cycles ofß-oxidation OH16. A fatty acyl CoA can produce activated electron carriers via fatty acid oxidation. Name any electron carrier(s) that are produced from one cycle of FA oxidation. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIU S Paragraph Arial 14px A v QThe role of L-carnitine in fatty acid metabolism is O Facilitate the transport of fatty acid from the cytosol to mitochondria O Activator of acetyl CoA carboxylase O None of the above O Serve as a cofactor for enzyme fatty acid synthase
- The PDH mechanism coenzyme that plays a direct role in the generation of acetyl CoA is NADH Lipoamide FADH2 TPPGTP or ATP is produced during the conversion of isocitrate into ketoglutarate succinyl CoA into succinate fumarate into malate malate into oxaloacetateFigure 27.3 illustrates the response of R (ATP-regenerating) and U (ATP-utilizing) enzymes to energy charge. a. Would hexokinase be an R enzyme or a U enzyme? Would glutamine: PRPP amidotransferase, the second enzyme in purine biosynthesis, be an R enzyme or a U enzyme? b. If energy charge = 0.5: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low? c. If energy charge = 0.95: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low?
- Using the ActiveModel for phosphofructokinase (Trypanosoma), describe the difference between the APO1, AP02, and holoenzyme conformations.The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If noncyclic photosynthetic electron transport leads to the translocation of 7 H+/2e- and cyclic photosynthetic electron transport leads to the translocation of 2 H+/e-, what is the relative photosynthetic efficiency of ATP synthesis (expressed as the number of photons absorbed per ATP synthesized) for noncyclic versus cyclic photophosphorylation? (Assume that the CF1CF0-ATP synthase yields 3 ATP/14 H+.)Consider the synthesis and degradation of tyrosine as shown in Figures 25.37, 25.38, and 25.48 to determine where the carbon atoms in PEP and erythrose-4-P would end up in acetoacetate and fumarate.