Which enzyme is used for both the synthesis and breakdown of acetoacetate? thiolase O HMG-CoA synthase B-hydroxybutyrate dehydrogenase B-Ketoacyl-CoA transferase
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- Identify the Krebs cycle enzyme that consumes a 3-carbon substrate molecule, producing a 2- carbon product molecule (attached to acetyl-CoA), along with NADH, and one molecule of CO2. succinyl CoA synthetase a-ketoglutarate dehydrogenase pyruvate dehydrogenase isocitrate dehydrogenase malate dehydrogenaseStep 2 of B-oxidation involves a reaction with chemistry characterized as a dehydration. B-Oxidation is shown below. H HO || || C-C-S – CoA FAD но R-CH2- C Acyl-CoA dehydrogenase H-C-C -S- CoA Acetyl-CoA Fatty acyl-CoA H FADH2 - CH2 - -c-S- CoA R- Thiolase Fatty acyl-CoA shortened by two carbons COA-SH H. он Successive cycles R-CH2-C-C- -C-S- CoA R– CH2 C=C-C-S-CoA H B-Ketoacyl-Co.A trans-A²Enoyl-CoA NADH + H* H,0 H H L-Hydroxyacyl-CoA dehydrogenase Enoyl-CoA hydratase R- CH,-c-c-C- S-CoA Но H NAD+ L-B-Hydroxyacyl-CoA True O FalseWhat is the rate-limiting step in the synthesis of acetyl CoA? oxidation regeneration of lipoamide decarboxylation transfer to lipoamide transfer to CoA
- C-CH2 + H* CO, + CH,-C-S-COA S-COA Malonyl-CoA Acetyl-CoA Hydrolase Transferase Lyase LigaseWhat is the final reaction in the final round of fatty acid synthase? Acetyl-CoA ACP Transacylase Beta-Ketoacyl- ACP Synthase Beta-Ketoacyl- ACP Dehydrase Palmitoyl thioesterase Malonyl-CoA ACP Transacylase Enoyl-ACP ReductaseAll of the following enzymes catalyze a committed step EXCEPT: HMG-CoA reductase Fatty acyl-CoA synthetase Acetyl-CoA carboxylase I Pyruvate dehydrogenase complex All of the above enzymes catalyze a committed step The brain can directly use all of the following chemicals as energy source EXCEPT: Acetoacetate b-hydroxybutyrate Glucose Fatty acids All of the above can directly be used by the brain as energy source
- Identify a pathway for utilization of the four carbons of acetoacetate in cholesterol biosynthesis. Carry your pathway as far as the rate-determining reaction in cholesterol biosynthesis. Drag the appropriate labels to their respective targets. succinyl-CoA succinate acetyl-CoA CoA-SH acetoacetyl-CoA HMG-CoA 2NADP 2NADPH+ 2H acetoacetate K UHL return to a mevalonate + CoA-SHB1. Complete the Kreb's Cycle Acetyl CoA Citric Acd Malate dehydrogenase NADH NAD Isocitrate NAD Isocitrate Fumarase dehydrogenase NADH Fumarate NAD" FAD COASH Succinate dehydrogenase Succinate Succinyl CoA Succinyl CoA synthetase B2. How many ATP molecules can be produced from 4 molecules of Acetyl CoA if all of them enter the Kreb's Cycle? Assume all the energy yielding products enters the electron transport chain.Although glucose cannot be formed from acetyl-CoA, triglycerides can enter the glycolytic pathway via which process? O Acetyl-CoA → oxaloacetate → phosphoenolpyruvate O Palmitoyl-CoAB- ketoacyl-CoA → a-ketoglutarate O Glycerol → DHAP Acyl-CoA glucose
- What is the common end-product of the catabolism of the branched chain amino acids that are converted to succinyl CoA? alpha-ketoglutarate glyceraldehyde phosphate oxaloacetate . propionylCoA isovalerateWhat is incorrect in the diagram shown below? Mall-com Thiolysis SCOA + H₂S-Co COA Acetyl CoA Acetyl CoA H₂C The products should be acetyl CoA and propionyl CoA. Sulfur should not be present in any molecular structure. Acyl group cleavage occurs in a different step of the B-oxidation pathway. The B-oxidation pathway directly generates ATP, which is not shown here.In beta-oxidation, which cofactor is required the for second oxidation reaction (conversion of beta-hydroxyacyl-CoA to beta-ketoacyl-CoA)? NAD+ water FAD CoA-SH