Homework Answers
Option b is correct answer
All enzymes used in glycolysis and gluconeogenesis are not same. In glycolysis, conversion of fructose-6-phosphate to frutose-1,6-bisphosphate requires the enzyme phosphofructokinase while in gluconeogenesis, conversion of fructose-1,6-bisphosphate to fructose-6-phosphate requires enzyme fructose-1,6-bisphosphatase
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Glycolysis and gluconeogenesis are concurrent and complementary metabolic pathways. Which of the following IS NOT TRUE...
Correctly match the following enzymes with the metabolic pathway they regulate. __ Phosphoenolpyruvate carboxykinase a. Gluconeogenesis...
Correctly match the following enzymes with the metabolic pathway they regulate. __ Phosphoenolpyruvate carboxykinase a. Gluconeogenesis __ Pyrubate dehydrogenase complex b. Glycolysis __ Glycogen Synthase c. Citric Acid Cylcle (Krebs) __ Pyruvate Carboxylase d. Glycogenolysis __ Pyruvate Kinase e. Glycogenesis
What is not true about gluconeogenesis? Select one: a. Gluconeogenesis shares seven steps of glycolysis b....
What is not true about gluconeogenesis?
Select one:
a. Gluconeogenesis shares seven steps of glycolysis
b. Three irreversible steps that differ between gluconeogenesis
and glycolysis are far from equilibrium.
c. Forming one glucose from pyruvate produces 4 ATP, 2 GTP and
2NADH
d. Acetyl-CoA can be converted into glucose in plants and
microbes, but not mammals.
e. Gluconeogenesis and glycolysis are reciprocally regulated to
prevent wasteful operation of both pathways at the same time.
D and B are wrong answers...
Which pair of opposite enzymes in the glycolysis and gluconeogenesis pathway are not allosterically regulated but...
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
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. s...
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...
Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable...
Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable expresses phosphofructokinase y glycerol stimulates the rate of 1. muscle 2. liver cell 3. both 4. neither glucose formation reciprocally regulates glycolysis and gluconeogenesis regulates the rate of expresses pyruvate carboxylase y cannot regulate the rate of expresses fructose 1.6 bisphosphatase Match the description with the process to which it applies transports glucose into mitochondria AMP regulates rate stimulated by high cellular glucose concentration...
Which of the following is true about gluconeogenesis? The pathways uses all the same enzymes as...
Which of the following is true about gluconeogenesis? The pathways uses all the same enzymes as glycolysis. Oxaloacetate is diverted from citric acid cycle to make glucose It is a pathway that is promoted with insulin secretion It role is to provide ketone bodies for export to other tissues when other sources of glucose are exhausted.
Which of the following statements about gluconeogenesis is correct? a. Because they form acetyl coA, fatty...
Which of the following statements about gluconeogenesis is correct? a. Because they form acetyl coA, fatty acids can be a substrate for gluconeogenesis. b. The reaction of phosphenolpyruvate carboxykinase is important to replenish the pool of citric acid cycle intermediates. c. The use of GTP as the phosphate donor in the phosphoenolpyruvate carboxykinase reaction provides a link between citric acid cycle activity and gluconeogenesis. d. There is a greater yield of ATP in anaerobic glycolysis than the cost for synthesis...
QUESTION 1 Which of the following processes/pathways CANNOT occur in the absence of O2? Oxidative phosphorylation...
QUESTION 1 Which of the following processes/pathways CANNOT occur in the absence of O2? Oxidative phosphorylation Substrate level phosphorylation Oxidation of NADH Photosynthesis Fermentation 1 points QUESTION 2 Phosphofructokinase (PFK-1) is one of the most regulated enzymes in metabolism. Which of the following would be expected to be an allosteric inhibitor of PFK-1? Glucose Fructose-6-phosphate Acetyl CoA AMP 1 points QUESTION 3 Which of the following is a reactant of the first reaction of glycolysis? Glucose ADP ATP...
6. (True/false) Because glycolysis produces pyruvate, glycolysis is an anabolic pathway. • True False 7. Which...
6. (True/false) Because glycolysis produces pyruvate, glycolysis is an anabolic pathway. • True False 7. Which metabolism is better equipped to support chemotaxis? • Aerobic respiration • Anaerobic respiration • Aerobic chemolitbatrophic metabolisms Gxcalysis alone • Tricarboxylic acid cycle alone 8. Comparing a Saccharomyces cerevisiae yeast cell to a Staphylococcus aureus bacterial cell, which one would have the higher S/V ratio? • Staphylococcus aureus • Saccharomyces cerevisiae 9. (True/false) Metabolic pathways represent a predictable linear set of reactions in the...
Create a metabolic pathway map that shows what happens to a glucose molecule that enters a muscle...
Create a metabolic pathway map that shows what happens to a glucose molecule that enters a muscle cell and becomes metabolized to lactate (in Oz-depleted muscle). Follow the lactate through the Cori cycle, and show how it ultimately gets converted to a glucose molecule that can once again enter the muscle cell. In addition, show how the glucose may be stored as glycogen, and mobilized from glycogen in both liver and muscle. Also show how pyruvate gets converted to acetyl-CoA...
What is not true about gluconeogenesis?
Select one:
a. Gluconeogenesis shares seven steps of glycolysis
b. Three irreversible steps that differ between gluconeogenesis
and glycolysis are far from equilibrium.
c. Forming one glucose from pyruvate produces 4 ATP, 2 GTP and
2NADH
d. Acetyl-CoA can be converted into glucose in plants and
microbes, but not mammals.
e. Gluconeogenesis and glycolysis are reciprocally regulated to
prevent wasteful operation of both pathways at the same time.
D and B are wrong answers...
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...
Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable expresses phosphofructokinase y glycerol stimulates the rate of 1. muscle 2. liver cell 3. both 4. neither glucose formation reciprocally regulates glycolysis and gluconeogenesis regulates the rate of expresses pyruvate carboxylase y cannot regulate the rate of expresses fructose 1.6 bisphosphatase Match the description with the process to which it applies transports glucose into mitochondria AMP regulates rate stimulated by high cellular glucose concentration...
Which of the following is true about gluconeogenesis? The pathways uses all the same enzymes as glycolysis. Oxaloacetate is diverted from citric acid cycle to make glucose It is a pathway that is promoted with insulin secretion It role is to provide ketone bodies for export to other tissues when other sources of glucose are exhausted.
6. (True/false) Because glycolysis produces pyruvate, glycolysis is an anabolic pathway. • True False 7. Which metabolism is better equipped to support chemotaxis? • Aerobic respiration • Anaerobic respiration • Aerobic chemolitbatrophic metabolisms Gxcalysis alone • Tricarboxylic acid cycle alone 8. Comparing a Saccharomyces cerevisiae yeast cell to a Staphylococcus aureus bacterial cell, which one would have the higher S/V ratio? • Staphylococcus aureus • Saccharomyces cerevisiae 9. (True/false) Metabolic pathways represent a predictable linear set of reactions in the...
Create a metabolic pathway map that shows what happens to a glucose molecule that enters a muscle cell and becomes metabolized to lactate (in Oz-depleted muscle). Follow the lactate through the Cori cycle, and show how it ultimately gets converted to a glucose molecule that can once again enter the muscle cell. In addition, show how the glucose may be stored as glycogen, and mobilized from glycogen in both liver and muscle. Also show how pyruvate gets converted to acetyl-CoA...
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