Homework Answers
4. B
Step 1 and 3 require ATP whereas step 7 and 10 yield ATP in glycolysis.
5. B
Fructose-6-phosphate is cleaved into dihydroxyacetone phosphate and glyceraldehyde-3-phosphate with the help of enzyme aldolase.
6. B
Hexokinase carries out first step of glycolysis, that is, conversion of glucose to glucose-6-phosphate in the presence of magnesium ion as cofactor.
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Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose-6-phosphate. Which...
Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose-6-phosphate. Which of these statements are accurate? The conformational shift that occurs when glucose, but nox water, enters the active site prevents water from hydrolyzing ATP Most kinases require the presence of a monovalent metal ion cofactor to prevent ATP hydrolysis. Hexokinase transfers the terminal phosphate of ATP to carbon 3 of glucose. Hexokinase consists of two domains, or lobes, that come together when glucose and...
1. Hexokinase catalyzes the ATP-dependent phosphorylation of a broad spectrum of 6- carbon sugars. In the...
1. Hexokinase catalyzes the ATP-dependent phosphorylation of a broad spectrum of 6- carbon sugars. In the reaction involving glucose and ATP, glucose-6-phosphate (G6P) and ADP are formed. D-Glucose + ATP G6P + ADP + Ht (AG",--20.9 kJ/mol). The enzyme specifically recognizes the acetal form of glucose, (a-D-glucopyranose. a. Draw the linear form of glucose using a Fischer projection and draw the structure of (a-D-glucopyranose. (5 pts each) b. Provide the net reaction for glycolysis. (5 pts) c. Assuming lysine acts...
42. The end result of glycolysis includes the a creation of 38 molecules of ATP. b....
42. The end result of glycolysis includes the a creation of 38 molecules of ATP. b. reduction of eight molecules of NAD to NADH. c.formation of two molecules of pyruvate. d. conversion of one molecule of glucose to lactic acid. e. None of the above 43. During the energy investing portion of glycolysis, the phosphates from ATP molecules are a. added to the first and sixth carbons of glucose. b. added to the second and fourth carbons of glucose. c....
4. Which of the following enzymes catalyzed reactions in glycolysis require(s) ATP as a substrate? A)...
4. Which of the following enzymes catalyzed reactions in glycolysis require(s) ATP as a substrate? A) Phosphoglycerate mutase E) Pyruvate kinase B) Aldolase F) Phosphofructokinase-1 C) Phosphoglycerate kinase G) Hexokinase D) Glyceraldehyde-3-phosphate dehydrogenase 5. Blood Lactate Levels during Vigorous Exercise The following graph shows the concentrations of lactate in blood plasma before, during, and after a 400 m sprint. Use your knowledge from chapter 14 to explain the causes of the rapid rise in lactate concentration? --Before-- - After Blood...
22. In glycolysis, during oxidation electrons are removed by: Α. ΑΤΡ B. molecular oxygen C. glyceraldehyde...
22. In glycolysis, during oxidation electrons are removed by: Α. ΑΤΡ B. molecular oxygen C. glyceraldehyde 3 phosphate D. NAD+ 23. During glycolysis ATP and Mg2+ coenzymes function: A. for phosphoglyceraldehyde 3 phosphate dehydrogenase B. for pyruvic kinase C. for phosphoglucoisomerase D. for hexokinase
16 Which step consists of a phosphorylation reaction in which ATP is the phosphate source? b...
16 Which step consists of a phosphorylation reaction in which ATP is the phosphate source? b B с с d D е Е 17 Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed during glycolysis? a 0% b 2% c 10% d 38% @ 100% 18 In addition to ATP, what are the end products of glycolysis? a CO2 and H2O b CO2 and pyruvate NADH and pyruvate d CO, and NADH e H2O, FADH2, and citrate 19...
14. Which of the following sugars could be transformed into fructose 6-phosphate if glucose and glucose...
14. Which of the following sugars could be transformed into fructose 6-phosphate if glucose and glucose phosphates were no longer available? A. Galactose B. Mannose C. Lactose D. Amylose E. Trehalose 15. Which pathway leads to a loss of carbon, which is undesirable in organisms that cannot fix carbon? A. Glycolysis B. Gluconeogenesis C. Pentose phosphate, nonoxidative phase D. Pentose phosphate, oxidative phase E. None of the above.
2. The first step in glycolysis is catalyzed by the enzyme herokinase: glucose + ATP glucose-6-P...
2. The first step in glycolysis is catalyzed by the enzyme herokinase: glucose + ATP glucose-6-P + ADP This reaction can be thought of as two coupled reactions (P is phosphate): (1) glucose + P + glucose-6-P (2) ATP + ADP + P For the overall reaction, AG" = -16.7 kJ/mol. For the hydrolysis of ATP (equation 2), AG = -310 kJ/mol. All reactions are performed at 37°C. (a) What is AGº for reaction 1? Iglucose - 6-11 if AG...
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...
the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→...
the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→ Fructose-P P-Fructose-(P FIGURE 5.7 glyceraldyde 3-phosphate P) ADP H-C-OH H20-P 1,3 diphospho- glycerate CH20-P 3 phospho glycerate phosphoenol pyruvate 15) Which step in Figure 5.7 shows a split of one molecule into two smaller molecules? 15) 4) 2 B) 4 )6 Dy H E) 5 16) Which step in Figure 5.7 shows a reaction involving a dehydrogenase? D) 8 A) 2 C) 6 E)5...
Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose-6-phosphate. Which of these statements are accurate? The conformational shift that occurs when glucose, but nox water, enters the active site prevents water from hydrolyzing ATP Most kinases require the presence of a monovalent metal ion cofactor to prevent ATP hydrolysis. Hexokinase transfers the terminal phosphate of ATP to carbon 3 of glucose. Hexokinase consists of two domains, or lobes, that come together when glucose and...
1. Hexokinase catalyzes the ATP-dependent phosphorylation of a broad spectrum of 6- carbon sugars. In the reaction involving glucose and ATP, glucose-6-phosphate (G6P) and ADP are formed. D-Glucose + ATP G6P + ADP + Ht (AG",--20.9 kJ/mol). The enzyme specifically recognizes the acetal form of glucose, (a-D-glucopyranose. a. Draw the linear form of glucose using a Fischer projection and draw the structure of (a-D-glucopyranose. (5 pts each) b. Provide the net reaction for glycolysis. (5 pts) c. Assuming lysine acts...
42. The end result of glycolysis includes the a creation of 38 molecules of ATP. b. reduction of eight molecules of NAD to NADH. c.formation of two molecules of pyruvate. d. conversion of one molecule of glucose to lactic acid. e. None of the above 43. During the energy investing portion of glycolysis, the phosphates from ATP molecules are a. added to the first and sixth carbons of glucose. b. added to the second and fourth carbons of glucose. c....
4. Which of the following enzymes catalyzed reactions in glycolysis require(s) ATP as a substrate? A) Phosphoglycerate mutase E) Pyruvate kinase B) Aldolase F) Phosphofructokinase-1 C) Phosphoglycerate kinase G) Hexokinase D) Glyceraldehyde-3-phosphate dehydrogenase 5. Blood Lactate Levels during Vigorous Exercise The following graph shows the concentrations of lactate in blood plasma before, during, and after a 400 m sprint. Use your knowledge from chapter 14 to explain the causes of the rapid rise in lactate concentration? --Before-- - After Blood...
22. In glycolysis, during oxidation electrons are removed by: Α. ΑΤΡ B. molecular oxygen C. glyceraldehyde 3 phosphate D. NAD+ 23. During glycolysis ATP and Mg2+ coenzymes function: A. for phosphoglyceraldehyde 3 phosphate dehydrogenase B. for pyruvic kinase C. for phosphoglucoisomerase D. for hexokinase
16 Which step consists of a phosphorylation reaction in which ATP is the phosphate source? b B с с d D е Е 17 Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed during glycolysis? a 0% b 2% c 10% d 38% @ 100% 18 In addition to ATP, what are the end products of glycolysis? a CO2 and H2O b CO2 and pyruvate NADH and pyruvate d CO, and NADH e H2O, FADH2, and citrate 19...
14. Which of the following sugars could be transformed into fructose 6-phosphate if glucose and glucose phosphates were no longer available? A. Galactose B. Mannose C. Lactose D. Amylose E. Trehalose 15. Which pathway leads to a loss of carbon, which is undesirable in organisms that cannot fix carbon? A. Glycolysis B. Gluconeogenesis C. Pentose phosphate, nonoxidative phase D. Pentose phosphate, oxidative phase E. None of the above.
2. The first step in glycolysis is catalyzed by the enzyme herokinase: glucose + ATP glucose-6-P + ADP This reaction can be thought of as two coupled reactions (P is phosphate): (1) glucose + P + glucose-6-P (2) ATP + ADP + P For the overall reaction, AG" = -16.7 kJ/mol. For the hydrolysis of ATP (equation 2), AG = -310 kJ/mol. All reactions are performed at 37°C. (a) What is AGº for reaction 1? Iglucose - 6-11 if AG...
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...
the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→ Fructose-P P-Fructose-(P FIGURE 5.7 glyceraldyde 3-phosphate P) ADP H-C-OH H20-P 1,3 diphospho- glycerate CH20-P 3 phospho glycerate phosphoenol pyruvate 15) Which step in Figure 5.7 shows a split of one molecule into two smaller molecules? 15) 4) 2 B) 4 )6 Dy H E) 5 16) Which step in Figure 5.7 shows a reaction involving a dehydrogenase? D) 8 A) 2 C) 6 E)5...
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