Homework Answers
- Glycerol can not be used by yeast anerobically because transformation of glycerol to ethanol will produce 1 more molecule of NADH, which cannot be re-oxidized into NAD in anaerobic conditions.
- Yeast can grow only aerobically on this source because dihydroxy acetone phosphate formed will enter Kreb cycle.
- It produces NADH which cannot be reoxidised to produce energy anerobically.
- NADH has to enter ETS in inner membrane of mitochondrial membrane to produce ATP
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3. Yeast can grow on glucose either anaerobically or aerobically. This choice is not available when...
6. A yeast variant was discovered that had a shorter glycolytic pathway. This "mutant" yeast made...
6. A yeast variant was discovered that had a shorter glycolytic pathway. This "mutant" yeast made a novel enzyme that catalyzed the following reaction: Glyceraldehyde-3-phosphate + H2 + NAD → 3-phosphoglycerate + NADH+H* A. Would you expect this novel yeast strain to grow well under anaerobic conditions using glucose as a carbon source? Explain. B. Would you expect this novel yeast strain to grow well under aerobic conditions using glucose as a carbon source? Explain.
25. The AG" for the reaction catalyzed by fructokinase is -8.4 kJ/mol at 37°C. What is...
25. The AG" for the reaction catalyzed by fructokinase is -8.4 kJ/mol at 37°C. What is the equilibrium constant for this reaction? B. U du 626 26 3.8 * 10-2 1.6 x 10-3 The Key cannot be determined if equilibrium concentrations are not given. 26. You discover a mutant yeast strain with a shortened glycolytic pathway resulting from a new enzyme that catalyzes the following reaction: Glyceraldehyde-3-phosphate + H2 + NAD → 3-phosphoglycerate + NADH + H+ Which of the...
1. Diagram the process of sucrose breakdown into glucose and fructose and submit as an image. Use...
1. Diagram the process of sucrose breakdown into glucose and
fructose and submit as an image. Use Worksheet 7 to illustrate this
process (Show structures and enzymes. Include any key
intermediates).
2. Diagram the process of fructose is metabolized into
glycolysis in adipose tissue and submit as an image. Use Worksheet
7 to illustrate this process (Show structures and enzymes. Include
any key intermediates)
3. Diagram the process of fructose is metabolized into
glycolysis in liver tissue and submit as...
Which sequence of amino acids would likely be found in the interior of a globular protein?...
Which sequence of amino acids would likely be found in the interior of a globular protein? GMWS IEDP HEKR DEAR Which of the following reactions is spontaneous in the forward direction when the reactants are my present in equirnolar amounts ? Glyceraldehyde 3 phosphate e Dihydroxyacetone phosphate creatine phosphate . ADP ATP creatine ADP. 1,3 bisphosphoglycerate 3 phosphoglycerate + ATP glycerol 3-phosphate + ADP = ATP glycerol NADH+ + H+ oxaloacetate NAD+ + malate NAD+ + pyruvate + COA NADH...
A suspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded...
A suspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. Adding an inhibitor of alcohol dehydrogenase to the yeast cell suspension results in rapid cell death. Why? a.) Without alcohol dehydrogenase, the acetaldehyde concentration increases to levels that are toxic to the yeast cells. b.) NADH generated during glycolysis cannot be recycled back to NAD+, thus anaerobic ATP production through glycolysis cannot be maintained. c.) Pyruvate is no longer...
In biotechnology, several sources of carbon are available to grow cells on. In order to minimize the waste of resources,...
In biotechnology, several sources of carbon are available to grow cells on. In order to minimize the waste of resources, it is important to be able to utilize other carbohydrates than glucose. Xylose is one of the most abundant building blocks in hemicellulose and thus represents a large fraction of plant products. The yeast Saccharomyces cerevisiae cannot utilize xylose as part of its carbohydrate metabolism. Through mutagenesis, a xylose utilizing yeast mutant was established. This mutant was able to grow...
Section 142 5) Dietary glycogen: .. is broken down to glucose by a different group of...
Section 14.2 5) Dietary glycogen: a. is broken down to glucose by a different group of enzymes than is dietary starch. b. is broken down to glucose-6-phosphate, which is then absorbed by the intestinal cells. c. results in the formation of limit dextrins in the intestine as an intermediate in its digestion. d. effectively produces an extra ATP when its glucose goes through glycolysis. Section: 14.2 Feeder Pathways for Glycolysis 6) Fructose: a. is broken down by a pathway known as fructolysis. b. can be phosphorylated by either hexokinase...
1) Which of the following glycolysis intermediates can be generated from glycerol? dihydroxyacetone phosphate 1,3-bisphosphoglycerate glyceraldehyde-3-phosphate...
1) Which of the following glycolysis intermediates can be generated from glycerol? dihydroxyacetone phosphate 1,3-bisphosphoglycerate glyceraldehyde-3-phosphate 3-phosphoglycerate 2) Which of the following is the oxidizing agent in the reaction that converts succinate to fumarate? FAD, NADH, NAD+, succinate, Coenzyme A, or FADH2 3) Five NADH molecules in the mitochondria can be made into _____ number of ATP.
I am confused with this glucose structure, Can you answer the question asked on the right...
I am confused with this glucose structure, Can you answer the
question asked on the right side of the page, please?
Glucose Hexokinase ATP Glucose 6-phosphate Phosphoglucose isomerase Fructose 6-phosphate Phosphofructo- ATP kinase-1 ADP Dihydroxyacetone phosphate Fructose 1,6-bisphosphate Aldolase Triose 5 phosphate Glyceraldehyde isomerase 3-phosphate (2 molecules ) Glyceraldehyde 2 NAD+ +2P, 3-phosphate 2 NADH + 2H dehydrogenase I 1,3-Bisphosphoglycerate (2 molecules) 7 Phosphoglycerate 2ADP kinase 2 ATP 3-Phosphoglycerate (2 molecules) Phosphoglycero- mutase 2-Phosphoglycerate (2 molecules) Enolase. > 2H2O Phosphoenolpyruvate...
15. During high intensity exercises, which substrate is metabolized anaerobically? a. Glucose b. Triglycerides c. Protein...
15. During high intensity exercises, which substrate is metabolized anaerobically? a. Glucose b. Triglycerides c. Protein 16. The production of glycogen from glucose is called: a. Glycogenesis b. Glycogenolysis c. Gluconeogenesis 17. Which metabolic pathway produces most ATP? a. The oxidation of one molecule of glucose b. The anaerobic metabolism of one molecule of glucose c. The oxidation of a Triglyceride with each fatty acid contain 24 carbons 18. The pumping of protons by the electron transport chain a. Produces...
6. A yeast variant was discovered that had a shorter glycolytic pathway. This "mutant" yeast made a novel enzyme that catalyzed the following reaction: Glyceraldehyde-3-phosphate + H2 + NAD → 3-phosphoglycerate + NADH+H* A. Would you expect this novel yeast strain to grow well under anaerobic conditions using glucose as a carbon source? Explain. B. Would you expect this novel yeast strain to grow well under aerobic conditions using glucose as a carbon source? Explain.
25. The AG" for the reaction catalyzed by fructokinase is -8.4 kJ/mol at 37°C. What is the equilibrium constant for this reaction? B. U du 626 26 3.8 * 10-2 1.6 x 10-3 The Key cannot be determined if equilibrium concentrations are not given. 26. You discover a mutant yeast strain with a shortened glycolytic pathway resulting from a new enzyme that catalyzes the following reaction: Glyceraldehyde-3-phosphate + H2 + NAD → 3-phosphoglycerate + NADH + H+ Which of the...
1. Diagram the process of sucrose breakdown into glucose and
fructose and submit as an image. Use Worksheet 7 to illustrate this
process (Show structures and enzymes. Include any key
intermediates).
2. Diagram the process of fructose is metabolized into
glycolysis in adipose tissue and submit as an image. Use Worksheet
7 to illustrate this process (Show structures and enzymes. Include
any key intermediates)
3. Diagram the process of fructose is metabolized into
glycolysis in liver tissue and submit as...
Which sequence of amino acids would likely be found in the interior of a globular protein? GMWS IEDP HEKR DEAR Which of the following reactions is spontaneous in the forward direction when the reactants are my present in equirnolar amounts ? Glyceraldehyde 3 phosphate e Dihydroxyacetone phosphate creatine phosphate . ADP ATP creatine ADP. 1,3 bisphosphoglycerate 3 phosphoglycerate + ATP glycerol 3-phosphate + ADP = ATP glycerol NADH+ + H+ oxaloacetate NAD+ + malate NAD+ + pyruvate + COA NADH...
I am confused with this glucose structure, Can you answer the
question asked on the right side of the page, please?
Glucose Hexokinase ATP Glucose 6-phosphate Phosphoglucose isomerase Fructose 6-phosphate Phosphofructo- ATP kinase-1 ADP Dihydroxyacetone phosphate Fructose 1,6-bisphosphate Aldolase Triose 5 phosphate Glyceraldehyde isomerase 3-phosphate (2 molecules ) Glyceraldehyde 2 NAD+ +2P, 3-phosphate 2 NADH + 2H dehydrogenase I 1,3-Bisphosphoglycerate (2 molecules) 7 Phosphoglycerate 2ADP kinase 2 ATP 3-Phosphoglycerate (2 molecules) Phosphoglycero- mutase 2-Phosphoglycerate (2 molecules) Enolase. > 2H2O Phosphoenolpyruvate...
15. During high intensity exercises, which substrate is metabolized anaerobically? a. Glucose b. Triglycerides c. Protein 16. The production of glycogen from glucose is called: a. Glycogenesis b. Glycogenolysis c. Gluconeogenesis 17. Which metabolic pathway produces most ATP? a. The oxidation of one molecule of glucose b. The anaerobic metabolism of one molecule of glucose c. The oxidation of a Triglyceride with each fatty acid contain 24 carbons 18. The pumping of protons by the electron transport chain a. Produces...
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