Queldy if electrons are receiveel from only cbhe citric acid cydeg beginnig-with acetyl= how maniy mole.cules af otygen cam be reduced from me acelyl-COA molecule and eme molecule of citrate 2 COA Anduy outim which of the following is the best oxidizingapmt2 @fermarae succinate
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- Understanding the Mechanisms of Reactions Related to Transketolase The mechanistic chemistry of the acetolactate synthase and phosphoketolase reactions (shown here) is similar to that of the transketolase reaction (Figure 22.30). Write suitable mechanisms for these reactions.myristic acid (14:0) to carbon dioxide and watera. rounds of the beta oxidation pathway will be involvedb. how many moles of acetyl CoA will be produced after complete beta oxidationc. how many moles of ATP will be obtained after complete beta oxidationUpon considering the complete oxidation of one mole of fatty acyl (CoA) of an arachidic acid (20:0). Answer the following lettersa. Rounds of beta oxidationb. total no. of acety CoA producedc. total no. of NADH produced from all rounds of beta oxidariond. total no. of FADH2 produced from all rounds of beta oxidation
- Complete the table below. Consider docosanoic acid (C21H43CO2H) Questions Solutions Answers a. Label the alpha and beta carbons. b. Draw the acetyl CoA derived from this fatty acid. c. How many acetyl CoA molecules are formed by complete B-oxidation? d. How many cycles of B-oxidation are needed for complete oxidation? e. How many molecules of ATP are formed from the complete catabolism of this fatty acid?Years ago there was interest in using uncouplers such as dinitrophenol asweight control agents. Presumably, fat could be oxidized without concomitant ATP synthesis for re-formation of fat or carbohydrate. Why was this a bad (i.e., fatal) idea?CHOOSE THE CORRECT LETTERHow many cycles of B-oxidation are necessary to completely oxidize 3 molecules stearic acid (C18H3602)?A. 24B. 18C. 27D. 21
- Consider docosanoic acid C12H43CO2H a. Label the alpha and beta Carbons. Show the beta-oxidation in an EXPANDED structure. b. Draw each acyl CoA derived from this fatty acid. c. How many acetyl Co A molecules are formed by complete beta-oxidation? d. How many cycles of beta-oxidation are needed for complete oxidation? e. How many molecules of ATP are formed from the complete catabolism of this fatty acid? Show the complete computation. f. How many moles of ATP per gram of fatty acid is formed from the complete catabolism of the given fatty acid? g. What is the molar mass of the given fatty acid? Solution: Show here the complete computations, [from a to e]Comparing Glycolysis Entry Points for Sucrose Sucrose can enter glycolysis by either of two routes: Sucrose phosphorylase: Sucrose + Pi fructose + glucose-1-phosphate Invertase: Sucrose + H20 fructose + glucose Would either of these reactions offer Jin advantage over the other In the preparation of hexoses fur entry into glycolysis?Assessing the Effect of Active-Site Phosphorylation on Enzyme Activity (Integrates with Chapter 15.) The serine residue of isocitrate dehydroenase that is phosphorylated by protein kinase lies within the active site of the enzyme. This situation contrasts with most other examples of coa1ent modification by protein phosphorylation. where the phosphorylation occurs at a sate remote from the active site. What direct effect do you think such active-site phosphorylation might have on the catalytic activity of isocitrate dehydrogcn.ise? (Sec Barford, D., 1991. Molecular mechanisms for the control of enzymic activity by protein phosphorytation. Biochimica et Biophysica Acta 1133:55—62.)