Homework Answers
Option C. Isocitrate dehydrogenase is the right answer.
Isocitrate dehydrogenase is a part of citric acid cycle. Thus it is not associated with glucogon.
Glucagon instructs the liver to convert glycogen to glucose, making glucose more available in the bloodstream.
Hence
A) Glycogen phosphorylase (involved in glycogenolysis),
B) Glucose-6-phosphate dehydrogenase (involved in glycolysis) and
D) 6-phosphofructo-2-kinase (involved in glycolysis) are involved in glucogon mediated actions on blood glucose levels.
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38. Which protein is not the immediate target of glucagon-derived signal transduction events for the regulation...
When the blood glucose concentration is low, the pancreas secretes glucagon to signal the liver to...
When the blood glucose concentration is low, the pancreas secretes glucagon to signal the liver to produce glucose and glucose-1-phosphate. Which metabolic steps are involved in this biosignaling pathway? Inactivation of glycogen synthase via phosphorylation by protein kinase A Activation of glycogen synthase via phosphorylation by protein kinase A Activation of phosphofructokinase-2 via phosphorylation by protein kinase A Activation of fructose-2,6-bisphosphatase via phosphorylation by protein kinase A Activation of phosphofructokinase-1 by fructose-2,6-bisphosphate Inhibition of fructose-1,6-bisphosphatase by fructose-2,6-bisphosphate Inactivation of pyruvate...
Arrange in proper order the events of the signal-transduction cascade for glycogen degradation in muscle. Muscle...
Arrange in proper order the events of the signal-transduction cascade for glycogen degradation in muscle. Muscle contraction begins. Phosphorolysis of glycogen yields glucose l-phosphate. Answer Bank Phosphorylase kinase is phosphorylated on its and a subunits. Intracellular CAMP levels increase, which activates protein kinase A. Epinephrine is released and binds to muscle ß-adrenergic receptors. The stimulatory G, protein dissociates and activates adenylate cyclase. Phosphorylase kinase is partly activated by binding Ca2+ Glycogen phosphorylase b is converted to glycogen phosphorylase a.
10.Which statement regarding the transcriptional regulation of PEP carboxykinase is false A. The promoter region of...
10.Which statement regarding the transcriptional regulation of PEP carboxykinase is false A. The promoter region of the PEP carboxykinase gene has binding sites for more than a dozen transcription factors B. Transcription and degradation are the primary means of regulating PEP carboxykinase gene C . A sterol regulatory binding element protein decrease expression of the PEP carboxykinase gene D. Insulin increase expression of the PEP carboxykinase gene 11. Glycogenesis - A. Occurs only in the liver and muscle B. Begins...
Need help with both questions, thank you! Question 5 In the liver, high blood glucose causes...
Need help with both questions, thank you!
Question 5 In the liver, high blood glucose causes glycogen phosphorylase a to become phosphorylated. switch to glycogen phosphorylase b. switch from T to R state. become dephosphorylated. switch from R to T state. Question 6 Which of the following proteins is not directly phosphorylated by PKA? OPFK2/fructose 2,6-bisphosphatase glycogen phosphorylase glycogen phosphorylase kinase glycogen synthase hormone-sensitive triacylglycerol lipase
Which is not involved in the regulation of glycogen phosphorylase? A) Allosteric inhibition of phosphorylase by...
Which is not involved in the regulation of glycogen phosphorylase? A) Allosteric inhibition of phosphorylase by ATP B) Indirect, positive regulation by glucagon C) Phosphorylation of phosphorylase by protein kinase A (PKA) D) Direct and indirect regulation by protein phosphatase 1 (PP1) E) Indirect, negative regulation by protein phosphatase 2B (PP2B)
€ → C .ap2020.collegeboard.org/Praott-aa857320- glucagon (a) A cell where PKB is always active has a mutation...
€ → C .ap2020.collegeboard.org/Praott-aa857320- glucagon (a) A cell where PKB is always active has a mutation that results in the permanent activation of GSK3. Based on the information in Figure 2, predict the effect of this mutation on the activity of glycogen synthase. (b) Justify your prediction in part (a). Describe the process that results in the activation of multiple copies of PKB in response to the binding of a single molecule of insulin to its receptor. (d) Explain why...
This discussion focuses on the regulation of glycolysis and gluconeogenesis by phosphofructokinase-2 and will help you...
This discussion focuses on the regulation of glycolysis and
gluconeogenesis by phosphofructokinase-2 and will help you apply
your understanding of these pathways and their regulation to
adaptations in cancerous cells.
You have successfully completed your internship rotation
with the antibiotic group at
MethylTranspharmiX and have moved into
their Cancer Therapeutics division.
In many cancers, cells use aerobic glycolysis rather than
oxidative phosphorylation as their main energy source. This is
known as the Warburg effect, and was first described by Otto...
When blood glucose levels are low, glucagon is secreted. Which of the following are the effects...
When blood glucose levels are low, glucagon is secreted. Which of the following are the effects of increased glucagon levels on glycosis and related reactions in liver ? A. Concentrations of F26BP are decreased B. Dephosphorylation of phosphofructokinase 2 and fructose bisphosphatase 2 occurs C. Glycosis is accelerated D. Glycosis is slowed down E. Phosphorylation of phosphofructokinade 2 and fructose bisphosphatase 2 occurs F. Concentrations of F26BP are increased I believe D & E , please explain and list any...
Which of the following liver enzymes are involved in the production and/or release of glucose into...
Which of the following liver enzymes are involved in the production and/or release of glucose into the bloodstream in response to glucagon? Choose all that apply for full credit A. fructose 1,6-bisphosphatase (FBP) B. glucokinase C. glucose 6-phosphatase D. glycogen phosphorylase E. phosphofructokinase-1 (PFK-1) F. phosphoglucomutase G. UDP-glucose pyrophosphorylase
QUESTION 4 Which of the following enzymes directly converts phosphorylaseb into the more active form, phosphorylase...
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...
Arrange in proper order the events of the signal-transduction cascade for glycogen degradation in muscle. Muscle contraction begins. Phosphorolysis of glycogen yields glucose l-phosphate. Answer Bank Phosphorylase kinase is phosphorylated on its and a subunits. Intracellular CAMP levels increase, which activates protein kinase A. Epinephrine is released and binds to muscle ß-adrenergic receptors. The stimulatory G, protein dissociates and activates adenylate cyclase. Phosphorylase kinase is partly activated by binding Ca2+ Glycogen phosphorylase b is converted to glycogen phosphorylase a.
Need help with both questions, thank you!
Question 5 In the liver, high blood glucose causes glycogen phosphorylase a to become phosphorylated. switch to glycogen phosphorylase b. switch from T to R state. become dephosphorylated. switch from R to T state. Question 6 Which of the following proteins is not directly phosphorylated by PKA? OPFK2/fructose 2,6-bisphosphatase glycogen phosphorylase glycogen phosphorylase kinase glycogen synthase hormone-sensitive triacylglycerol lipase
€ → C .ap2020.collegeboard.org/Praott-aa857320- glucagon (a) A cell where PKB is always active has a mutation that results in the permanent activation of GSK3. Based on the information in Figure 2, predict the effect of this mutation on the activity of glycogen synthase. (b) Justify your prediction in part (a). Describe the process that results in the activation of multiple copies of PKB in response to the binding of a single molecule of insulin to its receptor. (d) Explain why...
This discussion focuses on the regulation of glycolysis and
gluconeogenesis by phosphofructokinase-2 and will help you apply
your understanding of these pathways and their regulation to
adaptations in cancerous cells.
You have successfully completed your internship rotation
with the antibiotic group at
MethylTranspharmiX and have moved into
their Cancer Therapeutics division.
In many cancers, cells use aerobic glycolysis rather than
oxidative phosphorylation as their main energy source. This is
known as the Warburg effect, and was first described by Otto...
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...
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