Homework Answers
ANS-12) On activation of phosphodiesterase, cAMP gets converted to AMP. Effects of activation of phosphodiesterase on other enzymes are as follows :-
Phosphorylase kinase : Deactivates.
Glycogen phosphorylase : Deactivates.
Phosphoprotein phosphatase-1 : Activates.
Glycogen synthase : Activates.
Glycogen degradation is : Deactivated.
Glycogen synthesis is : Activated.
Insulin and epinephrine activate phosphodiesterase.
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12. An enzyme, phosphodiesterase, catalyzes the conversion of CAMP to AMP. Using the glycogen control diagram...
In muscle tissue, the ratio of phosphorylase a to phosphorylase b determines the rate of conversion of glycogen to gluco...
In muscle tissue, the ratio of phosphorylase a to phosphorylase b determines the rate of conversion of glycogen to glucose 1-phosphate. Classify how each event affects the rate of glycogen breakdown in isolated muscle tissue. Increased rate ; Decreased rate ; No change Option: addition of phosphorylase b kinase ; addition of a phosphatase inhibitor ; end of fight-or-flight response ; treatment with glucagon ; AMP allosteric binding activates phosphorylase b ; treatment with insulin ; addition of phosphatase PP1...
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...
Q5. The phosphorylase enzyme, which is involved in breakdown of glycogen to glucose, is controlled by...
Q5. The phosphorylase enzyme, which is involved in breakdown of glycogen to glucose, is controlled by both allosteric mechanisms and posttranslational modification. A) Describe how the T to R transition and activity of glycogen phosphorylase would change under the following conditions: i) high AMP levels and activation of phosphoprotein phosphatase, ii) activation of phosphorylase kinase, ili) activation of phosphorylase kinase and high glucose levels. B) What properties would an uncompetitive inhibitor of glycogen phosphorylase have, what would the Lineweaver Burk...
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...
Cyclic AMP (cAMP) is a common relay molecule in many signal transduction pathways, including the beta-adrenoceptor/cAMP/PDE...
Cyclic AMP (cAMP) is a common relay molecule in many signal transduction pathways, including the beta-adrenoceptor/cAMP/PDE pathway. Signals, such as epinephrine (adrenaline), bind to beta-adrenoceptors and cause adenylyl cyclase, an enzyme that catalyzes the production of cAMP, to become more active. The presence of cAMP then triggers a cellular response. Phosphodiesterase (PDE) catalyzes the degradation of cAMP. In this study, researchers were curious about how the density of cell cultures (how closely packed cells are in a culture dish) influences...
15) At 60 "C, it is found that the ction of alcohol dehydrogenase is stopped, this...
15) At 60 "C, it is found that the ction of alcohol dehydrogenase is stopped, this could be explained by the fact that the high temperature a) Changes the pH of the system b) Changes the enzyme solubility c) Neutralizes acids and bases in the system d) Increases the concentration of enzymes e) Denaturants the enzyme 16) Cefoperazone is a non-competitive inhibitor of alcohol dehydrogenase. In non-competitive enzyme inhibition the a) Vmax is increased b) Km is increased c) Km...
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...
1. According to the paper, what does lactate dehydrogenase (LDH) do and what does it allow...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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...
Q5. The phosphorylase enzyme, which is involved in breakdown of glycogen to glucose, is controlled by both allosteric mechanisms and posttranslational modification. A) Describe how the T to R transition and activity of glycogen phosphorylase would change under the following conditions: i) high AMP levels and activation of phosphoprotein phosphatase, ii) activation of phosphorylase kinase, ili) activation of phosphorylase kinase and high glucose levels. B) What properties would an uncompetitive inhibitor of glycogen phosphorylase have, what would the Lineweaver Burk...
15) At 60 "C, it is found that the ction of alcohol dehydrogenase is stopped, this could be explained by the fact that the high temperature a) Changes the pH of the system b) Changes the enzyme solubility c) Neutralizes acids and bases in the system d) Increases the concentration of enzymes e) Denaturants the enzyme 16) Cefoperazone is a non-competitive inhibitor of alcohol dehydrogenase. In non-competitive enzyme inhibition the a) Vmax is increased b) Km is increased c) Km...
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...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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