Homework Answers
The Correct options are-
1) phosphorylase kinase
2) Lysine
3) hydrolysis of GTP
4) D
5) 1,3-bisphosphoglycerate----- 3-phosphoglycerate
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QUESTION 4 Which of the following enzymes directly converts phosphorylaseb into the more active form, phosphorylase...
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...
which of the following statements is/are true?? can make more than ONE answer a The oxidation...
which of the following statements is/are true?? can make more
than ONE answer
a The oxidation of glyceraldehyde-3-phosphate requires NAD+ as an electron acceptor. b Under aerobic conditions NADH passes electrons to 02. c Under anaerobic conditions NADH reduces pyruvate to lactate and is thereby recycled to NAD+. You are given three tubes containing three unidentified bacteria. One bacterium lives by fermentation. d One bacterium lives by aerobic oxidation of glucose via the citric acid cycle. One bacterium lives by...
Can someone quick answer/check these questions? Thank you, will rate! (the answers that I have came...
Can someone quick answer/check these questions? Thank you, will rate! (the answers that I have came up with are in bold) Please help 51- Glycogenesis involves the following steps a) isomerisation b) activation c) elongation or coupling d) branching e) all of the above 52 During the breakdown of glycogen, free glucose is formed from A. the reducing end. B. the non-reducing end. C. glucose residues in an a 1-->4 linkage to the chain. D. glucose residues in an...
match the following 1. Fructose 1,6-bisphosphate is converted to Fructose 6- phosphate through this enzyme _____...
match the following 1. Fructose 1,6-bisphosphate is converted to Fructose 6- phosphate through this enzyme _____ 2. Synthesis of glucose from noncarbohydrate precursors _____ 3. Stage in which two molecules of ATP are consumed _____ 4. This is formed from pyruvate in yeast and several other microorganisms through fermentation _____ 5. The isomerization of glucose 6-phosphate to fructose 6-phosphate is a coversion of an aldose into a …._____ 6. Pyruvate is converted by pyruvate carboxylase into this intermediate _____ 7....
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...
Which one of the following statements about glucose metabolism is correct? A. Prokaryotes do not perform...
Which one of the following statements about glucose metabolism is correct? A. Prokaryotes do not perform Krebs cycle for respiration. B. Krebs cycle involves the breakdown of a molecule of pyruvate into 6 CO2, 8 NADH, 2 FADH2, and 2 GTP molecules. C. The enzyme that catalyzes the addition of phosphate molecules to ADP in order to make ATP is called a kinase. D. In both glycolysis and Krebs cycle, the energy released from the breakdown of molecules is being...
1. 2. 3. 4. Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate...
1.
2.
3.
4.
Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
QUESTION 4 Which of the following is true of glycogen synthase? • The enzyme has measurable...
QUESTION 4 Which of the following is true of glycogen synthase? • The enzyme has measurable activity only in liver. • It uses glucose-6-phosphate as donor of glucose units • It catalyzes addition of glucose residues to the nonreducing end of a glycogen chain by formation of (a1 + 4) bonds. • The conversion of an active to an inactive form of the enzyme is controlled by the concentration of CAMP
Which one of the following statements about gluconeogenesis is false? A. For starting materials, it can...
Which one of the following statements about gluconeogenesis is false? A. For starting materials, it can use carbon skeletons derived from certain amino acids. B. It consists entirely of the reactions of glycolysis, operating in the reverse direction. C. It employs the enzyme glucose 6-phosphatase. D. It is one of the ways that mammals maintain normal blood glucose levels between meals. E. It requires metabolic energy (ATP or GTP). The steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of...
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...
which of the following statements is/are true?? can make more
than ONE answer
a The oxidation of glyceraldehyde-3-phosphate requires NAD+ as an electron acceptor. b Under aerobic conditions NADH passes electrons to 02. c Under anaerobic conditions NADH reduces pyruvate to lactate and is thereby recycled to NAD+. You are given three tubes containing three unidentified bacteria. One bacterium lives by fermentation. d One bacterium lives by aerobic oxidation of glucose via the citric acid cycle. One bacterium lives by...
1.
2.
3.
4.
Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
QUESTION 4 Which of the following is true of glycogen synthase? • The enzyme has measurable activity only in liver. • It uses glucose-6-phosphate as donor of glucose units • It catalyzes addition of glucose residues to the nonreducing end of a glycogen chain by formation of (a1 + 4) bonds. • The conversion of an active to an inactive form of the enzyme is controlled by the concentration of CAMP
Which one of the following statements about gluconeogenesis is false? A. For starting materials, it can use carbon skeletons derived from certain amino acids. B. It consists entirely of the reactions of glycolysis, operating in the reverse direction. C. It employs the enzyme glucose 6-phosphatase. D. It is one of the ways that mammals maintain normal blood glucose levels between meals. E. It requires metabolic energy (ATP or GTP). The steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of...
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