Which of the following statements is TRUE about cholesterol biosynthesis? O NADH is needed to form mevalonate. HMG-CoA lyase catalyzes the committed step. Six molecules of isopentyl pyrophosphate condense to form squalene. O Cholesterol is composed of 30 carbon atoms.
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- Study Figure 19.18 and decide which of the following statements is false. Pyruvate dehydrogenase is inhibited by· NIADH. Pyruvate dehydrogenase is inhibited by AΤΡ. Citrate synthase is inhibited by NADH. Succinyl-CoA activates citrate synthase. Acetyl-CoA activates pyruvate carboxylase.Which of the following statements is TRUE about cholesterol biosynthesis? Group of answer choices HMG-CoA lyase catalyzes the committed step. Cholesterol is composed of 30 carbon atoms. NADH is needed to form mevalonate. Six molecules of isopentyl pyrophosphate condense to form squalene.Which of the following statements is TRUE about fatty acid biosynthesis? Group of answer choices: NADH is used as the reducing equivalent in the process. Malonyl ACP is the donor of the acetyl group. The product detaches from the fatty acid synthase complex when the chain length is usually 18 carbons. Oxaloacetate carries acetyl CoA to the cytosol.
- Which of the following is NOT produced during the reactions of acetyl-CoA formation? (only one choice is correct) A. Acetyl CoA B. Electrons C. CO2 D. ATPWhich of the following is true regarding the oxidation of 1 molecule of palmitate to 8 molecules of acetyl CoA by the beta-oxidation pathway? 7 molecules of FADH2 are formed None of the above 8 molecules of FADH2 are formed 8 molecules of NADH are formed BOTH 8 molecules of NADH are formed AND 8 molecules of FADH2 are formedWhich of the following statements is/are TRUE about fatty acid activation before β-oxidation? I. The process consumes energy equivalent to two moles of ATP. II. The fatty acid is activated by ATP to give a fatty acyl-CoA.
- Which of the following metabolic processes directly involve Acetyl Coa (both as an immediate reactant or a product)? (Select all that apply) PDH Gluconeogenesis Electron Transport Chain Krebs Cycle FA synthesis Glycolysis Pentose Phosphate Pathway FA breakdownWhere is the labeled carbomn found when the folliowing molecules are added to a cell carrying out palmitate synthesis. A.) biocarbonate with labelled carbon. B.) Acetyl-Coa with labeled methyl carbonThe reaction of acetyl-CoA and oxaloacetate in the TCA cycle forms a. 5-carbon α-ketoglutarate b. 4-carbon Succinyl-CoA c. 6-carbon citrate d. 6-carbon α-ketoglutarate e. 4-carbon citrate
- The Krebs cycle reaction shown below is catalyzed by __ enzyme and ___ pays for this reaction note only major metabolites are shown a. Synthetase, hydrolysis of acetyl CoA b. Synthase, hydrolysis of acetyl CoA c. Synthase, hydrolysis of NADH d. Synthetase, hydrolysis of ATPWhich of the following products of the non-oxidative stage of PPP is an intermediate of the glycolysis pathway? Group of answer choices Xylulose-5-phosphate Fructose-6-phosphate Erythrose-4-phosphate Ribose-5-phosphateThe 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"] .