whats the effect of phosphorylation on the activity of the following enzymes? 1. glycogen phosphorylase 2....
Homework Answers
Ans :
1) Glycogen phosphorylase is regulated by phosphorylation. Phosphorylation takes glycogen phosphorylase from a disordered state to an ordered one.It is done by binding allosteric effectors and by the catalytic mechanism.
2) Glycogen synthase activity is regulated by phosphorylation.Phosphorylation regulates glycogen synthase affinity for glucose 6-phosphate and its substrate UDP-glucose.
3) Acetyl CoA carboxylase is inhibited by phosphorylation .Epinephrine and glucagon activate protein kinase A, which in turn inhibits the phosphatase by phosphorylating it.
Add Answer to:
whats the effect of phosphorylation on the activity of the
following enzymes?
1. glycogen phosphorylase
2....
8. The figure on the right is a glycogen phosphorylase (7 pts). Quo), (1) Two hormones...
8. The figure on the right is a glycogen phosphorylase (7 pts). Quo), (1) Two hormones regulate glycogen phosphorylase. Explain the effect of each hormone on this enzyme, especially for a) phosphorylation status (phosphorylated vs. non-phosphorylated), and b) the enzyme activity (activated vs. inactivated) of this enzyme (4 pts). Glucagon: Insulin: (2) Glycogen synthase is a processive enzyme. What may be the unique structural feature of glycogen synthase that makes it a processive enzyme? (3 pts)
Which of these enzymes is correctly paired with one of its immediate products? a. Glycogen phosphorylase:...
Which of these enzymes is correctly paired with one of its immediate products? a. Glycogen phosphorylase: Glucose 6-P b. Fatty acid synthase: Oleate c. HMG CoA Reductase: HMG CoA d. Debranching enzyme: Free glucose
Sort the following enzymes according to those required for glycogen synthesis and those required for glycogen...
Sort the following enzymes according to those required for glycogen synthesis and those required for glycogen breakdown. (Note: Not all enzymes may be used.) Items (7 items) (Drag and drop into the appropriate area below) UDP-glucose pyrophosphoryla Glycogen branching enzyme Pyruvate carboxylase Glycogen synthase Phosphoglycerat e kinase Glycogen debranching enzyme Glycogen phosphorylase se Categories Glycogen Synthesis Glycogen Breakdown Drag and drop here Drag and drop here
D Question 30 Soveral hours after a meal, the brain uses During starvation, the brain uses...
D Question 30 Soveral hours after a meal, the brain uses During starvation, the brain uses as fuel. glucose from glycogen stored in the brain ketone bodies produced in the heart glucose from olycogen stored in the liver kolone bodies produced in the liver glucose from glycogen stored in the muscles kotone bodo produced in the liver fatty acids from adipose tissue glucose from gluconeogenesis in the liver D Question 31 Question 2 pts Which of the following enzyme pairs...
Easy question, 30 min timed assignment, please answer ASAP, thanks. 1. Glycerol from hydrolysis of triacylglycerols...
Easy question, 30 min timed assignment, please answer ASAP,
thanks.
1. Glycerol from hydrolysis of triacylglycerols enters gluconeogenesis at. a. glyceraldehyde-3-phosphate. b. dihydroxyacetone phosphate. c. 1,3-bisphosphoglycerate. d. 3-phosphoglycerate. e. 2-phosphoglycerate. or tissue prefers to use ketone bodies such as acetoacetate as a source of fuel instead of glucose? a. heart muscle c. brain d. liver e. stomach b. adrenal cortex 3. The key enzyme in glycogen degradation is a. glycogen phosphatase. b. glycogen hydrolase. c. glycogen phosphorylase A d. glycogen...
If glucose levels in the blood were low, which of the following enzymes would be active?...
If glucose levels in the blood were low, which of the following enzymes would be active? a. none of these b. Carnitine-Acyl transferase I c. Glycogen synthase d. Acetyl CoA carboxylase
1. Which of the following is true regarding glycogen metabolism? a. Glycogen synthase is activated by...
1. Which of the following is true regarding glycogen metabolism? a. Glycogen synthase is activated by phosporylation. b. Glycogen phosphorylase kinase activates glycogen phosphorylase through phosphorylation. c. The activation of PKA is downstream of insulin signaling in muscle cells. d. Glycogen phosphorylase releases free glucose from the ends of glycogen.
Answer ALL questions please. ALL QUESTIONS 1) Protein kinase A (PKA) is a family of enzymes...
Answer ALL questions please. ALL QUESTIONS
1) Protein kinase A (PKA) is a family of enzymes that are part of cell signal systems, and their effect is to phosphorylate proteins, altering their activity. As an example, PKA can phosphorylate the enzyme acetyl- CoA carboxylase, causing it to activate. The ?G for this phosphorylation is +4.2 kcal/mol. How is ATP used to phosphorylate this enzyme, and how does phosphorylation affect enzyme activity?
In the liver, which of the following enzymes is inhibited by malonyl CoA? A: fatty acid...
In the liver, which of the following enzymes is inhibited by malonyl CoA? A: fatty acid synthase, B: Acetyl CoA carboxylase, C: CPT-1, D: Hormone sensitive lipase
Biochemistry hw! uestion 2 (1 point) Choose all of the following that are consistent with net...
Biochemistry hw!
uestion 2 (1 point) Choose all of the following that are consistent with net glycogen synthesis given constant rate of glucose transport into the cell 1) rate of phosphofructokinase is low 2) glycogen synthase is in the phosphorylated form 3) 4) the rate of the kinase that phosphorylates glycogen synthase is lower than the rate glycogen phosphorylase is in the phosphorylase b form. of the phosphatase that dephophorylates glycogen phosphorylase. (Hint statement is worded correctly and requires making...
8. The figure on the right is a glycogen phosphorylase (7 pts). Quo), (1) Two hormones regulate glycogen phosphorylase. Explain the effect of each hormone on this enzyme, especially for a) phosphorylation status (phosphorylated vs. non-phosphorylated), and b) the enzyme activity (activated vs. inactivated) of this enzyme (4 pts). Glucagon: Insulin: (2) Glycogen synthase is a processive enzyme. What may be the unique structural feature of glycogen synthase that makes it a processive enzyme? (3 pts)
Sort the following enzymes according to those required for glycogen synthesis and those required for glycogen breakdown. (Note: Not all enzymes may be used.) Items (7 items) (Drag and drop into the appropriate area below) UDP-glucose pyrophosphoryla Glycogen branching enzyme Pyruvate carboxylase Glycogen synthase Phosphoglycerat e kinase Glycogen debranching enzyme Glycogen phosphorylase se Categories Glycogen Synthesis Glycogen Breakdown Drag and drop here Drag and drop here
D Question 30 Soveral hours after a meal, the brain uses During starvation, the brain uses as fuel. glucose from glycogen stored in the brain ketone bodies produced in the heart glucose from olycogen stored in the liver kolone bodies produced in the liver glucose from glycogen stored in the muscles kotone bodo produced in the liver fatty acids from adipose tissue glucose from gluconeogenesis in the liver D Question 31 Question 2 pts Which of the following enzyme pairs...
Easy question, 30 min timed assignment, please answer ASAP,
thanks.
1. Glycerol from hydrolysis of triacylglycerols enters gluconeogenesis at. a. glyceraldehyde-3-phosphate. b. dihydroxyacetone phosphate. c. 1,3-bisphosphoglycerate. d. 3-phosphoglycerate. e. 2-phosphoglycerate. or tissue prefers to use ketone bodies such as acetoacetate as a source of fuel instead of glucose? a. heart muscle c. brain d. liver e. stomach b. adrenal cortex 3. The key enzyme in glycogen degradation is a. glycogen phosphatase. b. glycogen hydrolase. c. glycogen phosphorylase A d. glycogen...
Answer ALL questions please. ALL QUESTIONS
1) Protein kinase A (PKA) is a family of enzymes that are part of cell signal systems, and their effect is to phosphorylate proteins, altering their activity. As an example, PKA can phosphorylate the enzyme acetyl- CoA carboxylase, causing it to activate. The ?G for this phosphorylation is +4.2 kcal/mol. How is ATP used to phosphorylate this enzyme, and how does phosphorylation affect enzyme activity?
Biochemistry hw!
uestion 2 (1 point) Choose all of the following that are consistent with net glycogen synthesis given constant rate of glucose transport into the cell 1) rate of phosphofructokinase is low 2) glycogen synthase is in the phosphorylated form 3) 4) the rate of the kinase that phosphorylates glycogen synthase is lower than the rate glycogen phosphorylase is in the phosphorylase b form. of the phosphatase that dephophorylates glycogen phosphorylase. (Hint statement is worded correctly and requires making...
Most questions answered within 3 hours.
-
26) Briefly describe, using words or simple diagrams, the
chemiosmotic theory for coupling oxidation to phosphorylation...
asked 1 hour ago -
Suppose that XX is a random variable with mean 16 and standard
deviation 5 . Also...
asked 2 hours ago -
Calculate the number density of argon gas at a temperature of
24C and a pressure of...
asked 5 hours ago -
Alternative
Classification
How to Estimate
Probabilities from Data? ( For continuous Attributes)
And How to generate...
asked 5 hours ago -
An explosion breaks a 20.0-kg object into three parts. The
object is initially moving at a...
asked 6 hours ago -
Calculate the approximate number of residues of Rubisco, which
is involved in carbon fixation in plants,...
asked 7 hours ago -
Other decisions about scientific claims can have a much broader
impact.ENERGYarrow-10x10.png, environment, health, security - all...
asked 8 hours ago -
I need to write a research paper and work cited about this
topic: The United States...
asked 8 hours ago -
Hello! I was wondering if I could have some help?
If the vapor pressure of carvone...
asked 8 hours ago -
An economist wants to estimate the mean per capita income (in
thousands of dollars) for a...
asked 9 hours ago -
What would be the input/output characteristic of a circuit
obtained by putting two of your 2's-complementers...
asked 9 hours ago -
In Drosophila, the transition from the syncytial blastoderm
stage to the cellular blastoderm stage is a...
asked 9 hours ago