Homework Answers
Ans :- Option (C) " It catalyzes addition of glucose residues to the nonreducing end of a glycogen chain by formation of (α1 → 4) bonds " is the true statement about glycogen synthase. While other statements are false. Glycogen synthase is an important enzyme in glycogenesis.
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QUESTION 4 Which of the following is true of glycogen synthase? • The enzyme has measurable...
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...
Thank you! please so answer and explain. 4. A proposed mechanism for glycogen synthase is given....
Thank you! please so answer and explain.
4. A proposed mechanism for glycogen synthase is given. Pick the TRUE statement: A X is UTP-Glucose B. Yis UTP C E-COO represents Asn of the enzyme active site D. A glucose carbocation is formed E C1 of the glycogen reducing end acts as a nucleophile 3. In a liver cell with sufficient oxygen, how many ATPs are made from one glucose assuming the cell uses the malate-aspartate shuttle? A. 2 CH reactions:...
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...
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...
Which of the diagrams illustrates the way in which the rate of an enzyme-controlled reaction depends...
Which of the diagrams illustrates the way in which the rate of an enzyme-controlled reaction depends on substrate concentration? * А B Rate of reaction MÚN Substrate concentration A B D When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose Which of the following enzyme groups can catalyse oxidation reactions? * O phosphorylases isomerases hydrolases dehydrogenases...
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...
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...
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...
12. Which of the following statements is true of enzyme catalysts? A B C To be...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
Which of the following statements about Huntington's is true? You can retry this question, the average...
Which of the following statements about Huntington's is true? You can retry this question, the average of your two answers is recorded. You should see feedback if you get a question wrong. O a. The mutated allele(s) has/have lost the function of keeping brain cells healthy, and is/are therefor a dominant disease O b. Huntington is a very rare and therfor recessive. c. Huntington strikes people after reproductive age and is therefor dominant. d. The mutated allele(s) has/have gained the...
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...
Thank you! please so answer and explain.
4. A proposed mechanism for glycogen synthase is given. Pick the TRUE statement: A X is UTP-Glucose B. Yis UTP C E-COO represents Asn of the enzyme active site D. A glucose carbocation is formed E C1 of the glycogen reducing end acts as a nucleophile 3. In a liver cell with sufficient oxygen, how many ATPs are made from one glucose assuming the cell uses the malate-aspartate shuttle? A. 2 CH reactions:...
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...
Which of the diagrams illustrates the way in which the rate of an enzyme-controlled reaction depends on substrate concentration? * А B Rate of reaction MÚN Substrate concentration A B D When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose Which of the following enzyme groups can catalyse oxidation reactions? * O phosphorylases isomerases hydrolases dehydrogenases...
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...
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...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
Which of the following statements about Huntington's is true? You can retry this question, the average of your two answers is recorded. You should see feedback if you get a question wrong. O a. The mutated allele(s) has/have lost the function of keeping brain cells healthy, and is/are therefor a dominant disease O b. Huntington is a very rare and therfor recessive. c. Huntington strikes people after reproductive age and is therefor dominant. d. The mutated allele(s) has/have gained the...
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