Homework Answers
Ans. The flow of glucose into mitochondria. In all species, the formation of oxaloacetate from pyruvate and TCA cycle intermediates is restricted to the mitochondrion, and the enzymes that convert PEP to glucose are found in the cytosol.
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In a liver cell converting lactate to glucose by gluconeogensis, which of the following keeps the...
Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable...
Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable expresses phosphofructokinase y glycerol stimulates the rate of 1. muscle 2. liver cell 3. both 4. neither glucose formation reciprocally regulates glycolysis and gluconeogenesis regulates the rate of expresses pyruvate carboxylase y cannot regulate the rate of expresses fructose 1.6 bisphosphatase Match the description with the process to which it applies transports glucose into mitochondria AMP regulates rate stimulated by high cellular glucose concentration...
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...
QUESTION 15 Which of the following is EXERGONIC? 6 CO2 + 6H20 - glucose + O2...
QUESTION 15 Which of the following is EXERGONIC? 6 CO2 + 6H20 - glucose + O2 fructose 6-phosphate + ATP – fructose 1,6-bisphosphate + ADP (AG = -3.4 kcal/mol) glucose 6-phosphate + ATP – fructose 6-phosphate + ADP (AG = +0.5 kcal/mol) GDP - Pi GTP + H2O QUESTION 17 Fate(s) of pyruvate is(are) Check all that apply. formation of ethyl alcohol by yeasts formation of glucose by gluconeogenesis in liver cells production of ketone bodies formation of lactate under...
Write a one sentence explanation for the following statement: The presence in liver of glucose-6-phosphatase is...
Write a one sentence explanation for the following statement: The presence in liver of glucose-6-phosphatase is essential to the function of the liver in synthesizing glucose for use by other tissues. a. Glucose-6-phosphate must be hydrolyzed in order for glucose to exit the liver cell and be exported to other tissues. b. Glucose-6-phosphate must be fully ucleaved in order for glucose to exit the liver cell and be exported to other tissues. c. Glucose-6-phosphate must lower the energy barier of...
6. In question 5, what is the most important reaction involved in formation of lactate? A)...
6. In question 5, what is the most important reaction involved in formation of lactate? A) dihydroxyacetone phosphate glycerol 3-phosphate D) pyruvate → lactate B) oxaloacetate → malate E) isocitrate → a-ketoglutarate C) glucose 6-phosphate → fructose 6-phosphate 7. During the process in question 5 (the rapid rise in lactate concentration), the NADH must be reoxidized to NAD+. Which of the following enzymes will be most affected if NADH is not reoxidized? A) Pyruvate kinase. C) Phosphofructokinase-1. E) aldolase. B)...
in cardiac 5. Cell-cell communication junctions in plants are called and muscle cells (animal). A. plasmodesmata,...
in cardiac 5. Cell-cell communication junctions in plants are called and muscle cells (animal). A. plasmodesmata, anchoring junction B. plasmodesmata gap junction C. stomata; anchoring junction D. stomata; conjunction junction Estomata; gap junction 6. Actin is found in A. cellulose B. intermediate filament C.microfilament D. microtubule E. cristae 7. Based on the endosymbiont theory which was once a free living prokaryote? A. nucleus B. Golgi C. Mitochondria D. rough endoplasmic reticulum E. B and D 8. Active transport A. occurs...
Biochemistry The conversation of glucose 6-phosphate to glucose takes place in which organelle? a. cytoplasm b....
Biochemistry The conversation of glucose 6-phosphate to glucose takes place in which organelle? a. cytoplasm b. endoplasmic reticulum c. mitochondria d. all of the above e. none of the above Which of the following describes an enzyme that can catalyze an oxidation reaction a. dehydrogenase b. isomerase c. mutase d. all of the above e. none of the above Pyruvate is decarboxylated at the active site of which unit of the PDH complex a. E1 b. E2 c. E3 d....
What of the following is NOT included as one of the major components of the plasma...
What of the following is NOT included as one of the major components of the plasma membrane as described via the “Fluid Mosaic Model” Lipids/fatty acids c. Peripheral proteins Nucleic acids d. Integral proteins Which of the following statement is true regarding biological life & cell theory? All organisms are made of cells c. All cells come from mitosis All cells possess a nucleus d. All cells come from meiosis What is the most important cellular organelle for cellular respiration...
1.) Which of the following is the substrate or product of the reactions that comprise the...
1.) Which of the following is the substrate or product of the reactions that comprise the oxidative phase of the pentose phosphate pathway? A) glyceraldehyde-3-phosphate B) Ribulose-5-phosphate C) Seduheptulose - 7 - phosphate D) Ribose-5-phosphate 2) The regulated reactions of gluconeogenesis have/are A) Activated by molecules indicating a low energy charge in the cell B) reversible reactions C) those thare counter to regulated reactions in glycolysis D)Large positive change in G values 3) The biosynthesis of triacylglycerols in animals uses...
QUESTION 9 In skeletal muscle under anaerobic conditions, pyruvate is further reduced to lactate. What is...
QUESTION 9 In skeletal muscle under anaerobic conditions, pyruvate is further reduced to lactate. What is the net equation for the payoff phase of glycolysis? glyceraldehyde-3-phosphate + 2 ATP + Pi ---> lactone + NAD+ glucose+2ATP - 2Glyceraldehyde-3-Phosphate + 2ADP + 2H+ 2glyceraldehyde-3-phosphate + 4ADP + 2Pi >2Lactate + 4ATP None of the above QUESTION 14 What is the ratio of carbon-bound hydrogens to carbon of glucose? 6/6 776 12/6 6/7 QUESTION 29 Why would it be advantageous to plants...
Match the description to the approptiate cell type gluconeogenesis pathway is unfavorable glycolysis pathway is favorable expresses phosphofructokinase y glycerol stimulates the rate of 1. muscle 2. liver cell 3. both 4. neither glucose formation reciprocally regulates glycolysis and gluconeogenesis regulates the rate of expresses pyruvate carboxylase y cannot regulate the rate of expresses fructose 1.6 bisphosphatase Match the description with the process to which it applies transports glucose into mitochondria AMP regulates rate stimulated by high cellular glucose concentration...
QUESTION 15 Which of the following is EXERGONIC? 6 CO2 + 6H20 - glucose + O2 fructose 6-phosphate + ATP – fructose 1,6-bisphosphate + ADP (AG = -3.4 kcal/mol) glucose 6-phosphate + ATP – fructose 6-phosphate + ADP (AG = +0.5 kcal/mol) GDP - Pi GTP + H2O QUESTION 17 Fate(s) of pyruvate is(are) Check all that apply. formation of ethyl alcohol by yeasts formation of glucose by gluconeogenesis in liver cells production of ketone bodies formation of lactate under...
6. In question 5, what is the most important reaction involved in formation of lactate? A) dihydroxyacetone phosphate glycerol 3-phosphate D) pyruvate → lactate B) oxaloacetate → malate E) isocitrate → a-ketoglutarate C) glucose 6-phosphate → fructose 6-phosphate 7. During the process in question 5 (the rapid rise in lactate concentration), the NADH must be reoxidized to NAD+. Which of the following enzymes will be most affected if NADH is not reoxidized? A) Pyruvate kinase. C) Phosphofructokinase-1. E) aldolase. B)...
in cardiac 5. Cell-cell communication junctions in plants are called and muscle cells (animal). A. plasmodesmata, anchoring junction B. plasmodesmata gap junction C. stomata; anchoring junction D. stomata; conjunction junction Estomata; gap junction 6. Actin is found in A. cellulose B. intermediate filament C.microfilament D. microtubule E. cristae 7. Based on the endosymbiont theory which was once a free living prokaryote? A. nucleus B. Golgi C. Mitochondria D. rough endoplasmic reticulum E. B and D 8. Active transport A. occurs...
QUESTION 9 In skeletal muscle under anaerobic conditions, pyruvate is further reduced to lactate. What is the net equation for the payoff phase of glycolysis? glyceraldehyde-3-phosphate + 2 ATP + Pi ---> lactone + NAD+ glucose+2ATP - 2Glyceraldehyde-3-Phosphate + 2ADP + 2H+ 2glyceraldehyde-3-phosphate + 4ADP + 2Pi >2Lactate + 4ATP None of the above QUESTION 14 What is the ratio of carbon-bound hydrogens to carbon of glucose? 6/6 776 12/6 6/7 QUESTION 29 Why would it be advantageous to plants...
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