How many cycles of the synthesis pathway are needed to produce lauric acid, C₁1H23COOH? || acetyl-ACP CH3 CO₂
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- Years ago there was interest in using uncouplers such as dinitrophenol as weight control agents. Presumably, fat could be oxidized without concomi- tant ATP synthesis for re-formation of fat or carbohydrate. Why was this a bad (i.e., fatal) idea?Which of the following is NOT part of the multi-enzyme complex of fatty acid synthase? O enoyl-ACP reductase O acetyl CoA carboxylase O 3-hydroxybutyrylACP-dehydratese O B-ketoacyl-ACP reductaseWhat enzyme will not be used if the oxidative portion of the pentose phosphate pathway is operating to produce ribose 5-phosphate? Ribulose 5-phosphate isomerase 6-phosphoglucono-lactonase 6-phosphogluconate dehydrogenase Transaldolase
- The citrate cycle is a metabolic engine generating [ Select: "carbon monoxide", "NAD, FAD and GDP", "carbon dioxide, NADH, FADH, and GTP"] from the fuel [ Select : "triglycerides", "acetyl-CoA"]. It is considered a cycle since all components must be maintained beginning with the addition of the two carbons from acetyl-CoA to form [ Select ] ["succinate", "citrate"] from [ Select ]["fumarate", "oxaloacetate"]. The citrate cycle depends on the presence of oxygen since [ Select ]["oxygen is directly required in the citrate cycle", "oxygen is required for NADH and FADH2 oxidation, and their accumulation in the absence of electron transport results in feedback inhibition of the citrate cycle"] .Trace the pathway of [1-14C]pyruvate through gluconeogenesis. Use an asterisk to indicate the location of 14C in all intermediates and in the final gluconeogenesis product, glucose. CH₂ -C=0 Coo [1-1C]Pyruvate CH,OPO H-C-OH C-OPO || 1,3-Bisphospho- glycerate ↑ -coo -CH₂ KC=0 -Coo Oxaloacetate CH,OPO H-C-OH COO 3-Phosphoglycerate CH₂ -OPO OP COO Phosphoenolpyruvate CH,OH H-C-OPO COO 2-PhosphoglycerateH H H-C-OH CH-Q HOOHH H OH Glucose H-C=O H-C-H H H-C=0 ATP ADP H-C-OH HO-C-H H-C-OH Н Pyruvate OH Hexokinase ATP ADP IVE pyruvate kinase H-C-O-P-0 Glucose 6-phosphate (PEP) GLYCOLYSIS H-C-O-P=O H-C-OHO-H-C-OHO kinase isomerase но Phosphoenolpyruvate H-C-OH ÇO ATP ADP HO-C-H H-C-OH HO-C-H Phosphofructo H-C-OH aldose H-C-OHỌ H-C-O-P-0 HO Fructose 1, 6-bisphosphate H-C-O-P=O H 6- Fructose 6-phosphate H H-C-O-P=O C=O 6- Fructose bisphosphate H-C-OHO ATP 9 H H-C-O-PO C=O o- HO-C-H Dihydroxyacetone phosphate H ADP Glyceraldehyde 3-phosphate dehydrogenase 2X Triose phosphate isomerase H c=0 H-C-OHO H-C-O-PO 3-phosphate Hỏ NAD + P NADH+H* -O-P=O Ó c=0 Glyceraldehyde N H-C-O-P-O Enolase H-OHO phosphoglycerates-C-O-P-0 phosphoglycerate HC-OHO kinase H H-C-O-P=O Ĥ 6- 2-Phosphoglycerate 3-Phosphoglycerate 1,3-Bisphosphoglycerate
- How many tritium atoms (PH) are incorporated into palmitate when fatty acid synthesis is carried out in vitro with the following labeled substrate? -ooc-C°H,-C-s-CoAB-oxidation of a 15:0 fatty acid will result in the production of O 7 acetyl CoA, 7 FADH2, and 7 NADH O 7 acetyl CoA, 1 propionyl CoA, 8 FADH2, and 8 NADH 6 acetyl CoA, 1 propionyl CoA, 7 FADH2, and 7 NADH 6 acetyl CoA, 1 propionyl CoA, 6 FADH2, and 6 NADHIn step 2 of the fatty acid biosynthesis, the acetyl-S-synthase condenses the acetyl group (C2) with a malonyl-ACP (C3) and subsequent decarboxylation to acetoacetyl-ACP (C4). Give the molecule [A] after condensation and before decarboxylation in the reaction below. synthase (A] ACP + CO2 + HS synthase ACP HO S.
- During fatty acid synthesis, which of the below is the product of β-enoyl-ACP reductase:What is(are) the only active site(s) not used in the second round of fatty acid synthase? Select all that apply. Group of answer choices Acetyl-CoA ACP Transacylase Beta-Ketoacyl- ACP Synthase Beta-Ketoacyl- ACP Dehydrase Palmitoyl thioesterase Malonyl-CoA ACP Transacylase Enoyl-ACP ReductaseMatch each of the enzymes involved in de novo pyrimidine synthesis with the correct description: _______ Dihydroorotate dehydrogenase _______ UMP synthase_______ Carbamoyl phosphate synthetase II _______ TMP synthase _______ CTP synthetase_______ Aspartate transcarbamoylase _______ PRPP synthetase (A) attaches an aspartate to an activated carbamoyl molecule(B) bifunctional enzyme that combines a nitrogenase pyrimidine ring to an activated ribose(C) catalyzes the formation of the activated ribose sugar(D) uses glutamine to add an amine to a preformed nucleotide(E) produces the first cyclic nitrogenase ring during de novo pyrimidine synthesis(F) combines bicarbonate and nitrogen from glutamine in the first step of pyrimidine ring synthesis (G) uses a folate derivative to add a methyl group to a preformed nucleotide