pyruvate form ____ in the c4 pathway.
a) oxloacetate
b)malate
c)fumerate
d)pep
pyruvate form ____ in the c4 pathway. a) oxloacetate b)malate c)fumerate d)pep
Pyruvate kinase catalyzes the last reaction in the glycolytic
pathway:
phosphoenolpyruvate (PEP) + ADP --> pyruvate + ATP
There are four different mammalian forms of pyruvate kinase. All
catalyze the same reaction, but they differ in their response to
the glycolytic metabolite fructose-1,6-bisphosphate (F16BP).
The activity of two forms of pyruvate kinase was measured at
various concentrations of PEP, as shown below. Activity was
measured in the presence (blue circles) and absence (red circles)
of F16BP.
Pyruvate Kinase Form 1...
Pyruvate kinase catalyzes the last reaction in the glycolytic
pathway:
phosphoenolpyruvate (PEP) + ADP --> pyruvate + ATP
There are four different mammalian forms of pyruvate kinase. All
catalyze the same reaction, but they differ in their response to
the glycolytic metabolite fructose-1,6-bisphosphate (F16BP).
The activity of two forms of pyruvate kinase was measured at
various concentrations of PEP, as shown below. Activity was
measured in the presence (blue circles) and absence (red circles)
of F16BP.
Pyruvate Kinase Form 1...
For the overall pathway of mannose + PEP converted to mannose-6-P + pyruvate, what is the standard free energy change of the reaction? You may use one or more of the reactions listed below. For full credit, show your work. You could use Eq #instead of writing out the equation. delta Gº_(in kJ/mol.) Equation #1. Mannose-6-P + H2O -> Mannose + Pi -2.9 Equation #2. PEP + H2O --> pyruvate + Pi -61.9 Equation #3. PEP + ADP --> Pyruvate...
Describe “hub” molecules acetyl CoA and pyruvate that serve
different pathways. Explain metabolic regulation favoring metabolic
pathway choices leading to and from hub molecules. Describe how
C.A.C. serves as a “hub “pathway. Use picture as a reference.
Pyruvate Glucose Fatty acids sterols pyruvate carboxylase Acetyl-CoA PEP carboxykinase Glutamine Citrate Phosphoenolpyruvate (PEP) Proline Arginine Oxaloacetate PEP carboxylase Citric acid cycle a-Ketoglutarate Malate Glutamate Aspartate Asparagine Serine Glycine Cysteine malic enzyme Purines Succinyl-CoA Phenylalanine Pyrimidines Pyruvate Tyrosine Tryptophan Porphyrins heme Figure 16-16...
11. Name the enryme catalyzing the following reaction a pyruvate carboxylase b propionyl-SCoA carboxylase c. PEP carbosylase d acetyl-SCoA carboxylase citae
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate (Pi) (a) Is the reaction favorable under standard biochemical conditions? Explain your answer. (b) What is the equilibrium constant (K) of this reaction at 25°C? In cells the direct hydrolysis of PEP rarely occurs. Rather, the hydrolysis of PEP and the reverse hydrolysis of ATP are coupled (c) w rite out the coupled reaction and determine its ΔG at 25°C The hydrolysis of ATP...
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?...
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. acetyl-SCoA carboxylase c. propionyl-SCoA carboxylase d. PEP carboxykinase The source of acetyl-SCoA in the cytoplasm is: a carnitine b. oxaloacetate citrate d pyruvate e. lactate 10.
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. acetyl-SCoA carboxylase c. propionyl-SCoA carboxylase d. PEP carboxykinase The source of acetyl-SCoA in the cytoplasm is: a carnitine b. oxaloacetate...
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...
Which pair of opposite enzymes in the glycolysis and gluconeogenesis pathway are not allosterically regulated but rather regulated by compartmentalization? Select one: a. pyruvate kinase/PEP carboxykinase b. phosphofructokinase 1/fructose-1,6-bisphosphatase c. phosphofructokinase 2/fructose-2,6-bisphosphatase d. hexokinase/glucose-6-phosphatase