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1. An enzyme that phosphorylates nucleotides is c. phosphofructokinase b. phosphorylase d. succinyl-CoA synthetase a. malic...
12. Which enzyme catalyzes the reaction shown? Oo 9% a. succinyl-CoA synthetase b. succinate dehydrogenase c. pyruvate dehydrogenase d、a-ketoglutarate dehydrogenase 13. Which of the reactions of the citric acid cycle requires FAD as a coenzyme? a. the conversion of isocitrate to a-ketoglutarate b. the conversion of citrate to isocitrate c. the conversion of succinate to fumarate d. the conversion of malate to oxaloacetate 14. Another name for Complex I in the electron transport chain is a. cytochrome c oxidase. b....
27 biochem b.3 c. 3.3 d. 10 e. cannot be determined 27. Which of the following enzymes is correctly paired with an inhibitor? a. hexokinase: ATP b. phosphofructokinase-1: AMP C. pyruvate kinase: ATP . d. phosphofructokinase-2: citrate e. glyceraldehyde-3-phosphate dehydrogenase: 1,3-bisphosphoglycerate 28. The correct sequence of steps between succinyl-CoA and ATP in mammals to "preserve the energy of the thioester bond are: A. succinyl-phosphate. B. phosphohistidine. C. GTP. D. Acetyl-CoA. 2 A, B, C b. B, C, A
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
1.Predict the effect of a large amount of acetyl-CoA on the activity of pyruvate dehydrogenase and the rate of glycolysis. Note: pyruvate dehydrogenase is the enzyme that catalyzes the formation of acetyl-CoA from pyruvate. a. Pyruvate dehydrogenase activity will decrease while the rate of glycolysis will increase. b. Both pyruvate dehydrogenase activity and the rate of glycolysis will decrease. c. Pyruvate dehydrogenase activity will increase while the rate of glycolysis will decrease. d. The rate of glycolysis will increase, thereby,...
I1. Mammals lack the enzyme a. Lactate dehydrogenase b. Pyruvate kinase Alcohol Dehydrogenase c. d. Pyruvate decarboxylase None of the above are correct e. 12. The first reaction of the Krebs cycle combines Oxaloacetate and Acetyl CoA to make Citrate b. a. Malate and NADH to make Citrate a-ketoglutarate and citrate to make CO2 d. c- Succinate and Citrate to make Oxaloacetate 13. The electrons held by NADH and FADH, are donated to the which complexes in the ETC respectively?...
1) Select the cellular (and subcellular, if relevant) location for each enzyme listed below. (Cytoplasm,Inner membrane of mitochondria, outer membrane of mitochondria, Matrix of mitochondria) Phosphofructokinase: ATP synthase: Hexokinase: Pyruvate dehydrogenase: Aldolase: Citrate synthase: NADH dehydrogenase complex: 2) Based on our discussion in class, which enzyme performs the first committed step in glycolysis? ( i picked hexokinase on this and got it wrong) a. phosphofructokinase b. pyruvate kinase c. hexokinase d. cytochrome e. aldolase
Can someone quick answer/check these questions? Thank you, will rate! (the answers that I have came up with are in bold) Please help 51- Glycogenesis involves the following steps a) isomerisation b) activation c) elongation or coupling d) branching e) all of the above 52 During the breakdown of glycogen, free glucose is formed from A. the reducing end. B. the non-reducing end. C. glucose residues in an a 1-->4 linkage to the chain. D. glucose residues in an...
29. The activity of the enzyme phosphofructokinase is a) stimulated by low energy charge b) inhibited by fructose 2,6-bisphosphate c stimulated by fructose 1.6-bisphosphate d) all of the above 30. NADH is produced at a) aldolase catalyzed reaction b) Glyceraldehyde-3-phosphate dehydrogenase catalyzed reaction c) pyruvate kinase catalyzed reaction d) hexokinase catalyzed reaction 31. The transfer of 3-phosphoglycerate to 2-phosphoglycerate is catalyzed by which enzyme? a) PGM b)PK c)G2PDH d)TPI e)PFK 32. The enzyme aldolase catalyzes which reaction in Glycolysis? a)...
QUESTION 4 Which of the following enzymes directly converts phosphorylaseb into the more active form, phosphorylase a? A. CAMP-dependent protein kinase B. phosphorylase kinase C. protein kinase A D. adenylate kinase E phosphoprotein phosphatase The biotin prosthetic group of pyruvate carboxylase is covalently attached to a residue of the enzyme ? A. Vakine B. serine C. lysine D. arginine E. the biotin is attached non-covalently Which of the following serves as the energy source for the metabolic conversion of oxaloacetate...
In animal cells, the methyl side chains on the tetrapyrols of Protoporphyrin IX are derived from? A. C-2 of Glycine B. C-1 of delta-aminolevulinic acid C. C-3 of Succinyl CoA D. C-4 of Succinyl CoA E. C-1 of Glycine