Which pair of opposite enzymes in the glycolysis and gluconeogenesis pathway are not allosterically regulated but...
Which pair of opposite enzymes in the glycolysis and gluconeogenesis pathway are not allosterically regulated but rather regulated by compartmentalization?
Select one:
a. pyruvate kinase/PEP carboxykinase
b. phosphofructokinase 1/fructose-1,6-bisphosphatase
c. phosphofructokinase 2/fructose-2,6-bisphosphatase
d. hexokinase/glucose-6-phosphatase
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Which pair of opposite enzymes in the glycolysis and
gluconeogenesis pathway are not allosterically regulated but...
In an ATP synthase which has 12 copies of the c subunit, how many protons move...
In an ATP synthase which has 12 copies of the c subunit, how many protons move through the enzyme for each one ATP that is synthesized? 44. 4 12. 45. An uncoupler acts by: a. Inhibiting a redox couple b. nhibiting proton pumping complexes. c. nhting oxygen reduction d. Collapsing the proton gradient e. Uncoupling the F and Fo subunits of the ATP synthase GLUCONEOGENESIS The reactions of glycolysis that are replaced by different enzymes in the gluconeogenesis pathway are...
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...
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...
BIOCHEM Compare and contrast how fructose‐1,6‐bisphosphatase and phosphofructokinase are regulated in response to energy charge. What...
BIOCHEM Compare and contrast how fructose‐1,6‐bisphosphatase and phosphofructokinase are regulated in response to energy charge. What specific allosteric effectors are involved? What is meant by reciprocal regulation. Pyruvate kinase is also regulated allosterically by fructose‐1,6‐bisphosphate. Explain the rationale for this regulation. Do these compounds stimulate or inhibit pyruvate kinase?
Page 1: Question 5 (1 point) ✓ Saved Match the description of cells of liver, muscle,...
Page 1: Question 5 (1 point) ✓ Saved Match the description of cells of liver, muscle, both, or neither. Consider only the gluconeogenesis and glycolysis pathways but ignore whether they have measurable rate under cellular conditions. Assume both cells have constant supplies of pyruvate and glucose and are aerobic. expresses pyruvate carboxykinase has oxaloacetic acid (OAA) as an intermediate expresses glucose 6- phosphatase 1. liver 2. muscle forms net oxaloacetic acid (OAA) 3. both does not express fructose 1,6-bisphosphatase 4....
Conversely, in muscle cells, low energy charge ["activates or inhibits"] glycolysis. Specifically, AMP activates the enzyme ["phosphofructokinase...
Conversely, in muscle cells, low energy charge ["activates or inhibits"] glycolysis. Specifically, AMP activates the enzyme ["phosphofructokinase 1 or hexokinase"] . Pyruvate kinase is positively regulated by [fructose 1,6-bisphosphate or glucose 6-phosphate"] through feed-forward activation. The enzyme ["hexokinase or phosphofructokinase 1] is not affected. Choose one of the answers in the brackets.
The primary regulatory point of gluconeogenesis is____? a. glucose-6-phosphatase b. fructose-1,6-biphosphatase c. fuctose-2,6-biphosphatase d. pyruvate carboxylase...
The primary regulatory point of gluconeogenesis is____? a. glucose-6-phosphatase b. fructose-1,6-biphosphatase c. fuctose-2,6-biphosphatase d. pyruvate carboxylase (wrong answer) e. PEP carboxykinase Please explain why pyruvate carboxylase is wrong (isn't it one of the regulatory points, is it wrong because it isn't the primary one? and if so, how do you know what the primary one is?) and state the right answer and an explanation as to why.
In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate...
In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate is excreted into the blood and returns to the liver where it is converted back into glucose by gluconeogenesis. For each enzyme below, identify whether it is involved in the glycolysis pathway, gluconeogenesis pathway, both pathways or neither pathway. aldoses glycolysis gluconeogenesis both neither phosphoenolpyruvate carboxykinase glycolysis gluconeogenesis both neither transketolase glycolysis gluconeogenesis both neither pyruvate kinase glycolysis gluconeogenesis both neither phosphoglycerate kinase glycolysis...
In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate...
In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate is excreted into the blood and returns to the liver. In the liver, lactate is converted back into glucose by gluconeogenesis. For each given enzyme, identify whether it is involved in the glycolysis pathyway, gluconeogenesis pathway, both pathways, or neither pathway. The enzyme aldolase is involved in The enzyme pyruvate carboxylase is involved in neither pathway. the gluconeogenesis pathway. the glycolysis pathway. The enzyme...
After eating, elevated levels of fructose 6-phosphate will stimulate ["phosphoprotein phosphatase or Protein kinase A (PKA)"]....
After eating, elevated levels of fructose 6-phosphate will stimulate ["phosphoprotein phosphatase or Protein kinase A (PKA)"]. This causes the dephosphorylation of the the phosphofructokinase 2/fructose 2,6-bisphosphate polypeptide to stimulate the activity of ["phosphofructokinase 2 or fructose 2,6-bisphosphatase"].This results in an increase of ["fructose 6-phosphate or fructose 2,6-bisphosphate"] and activation of ["glycolysis or gluconeogenesis"] . Choose one of the answers in the brackets.
In an ATP synthase which has 12 copies of the c subunit, how many protons move through the enzyme for each one ATP that is synthesized? 44. 4 12. 45. An uncoupler acts by: a. Inhibiting a redox couple b. nhibiting proton pumping complexes. c. nhting oxygen reduction d. Collapsing the proton gradient e. Uncoupling the F and Fo subunits of the ATP synthase GLUCONEOGENESIS The reactions of glycolysis that are replaced by different enzymes in the gluconeogenesis pathway are...
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...
Page 1: Question 5 (1 point) ✓ Saved Match the description of cells of liver, muscle, both, or neither. Consider only the gluconeogenesis and glycolysis pathways but ignore whether they have measurable rate under cellular conditions. Assume both cells have constant supplies of pyruvate and glucose and are aerobic. expresses pyruvate carboxykinase has oxaloacetic acid (OAA) as an intermediate expresses glucose 6- phosphatase 1. liver 2. muscle forms net oxaloacetic acid (OAA) 3. both does not express fructose 1,6-bisphosphatase 4....
In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate is excreted into the blood and returns to the liver where it is converted back into glucose by gluconeogenesis. For each enzyme below, identify whether it is involved in the glycolysis pathway, gluconeogenesis pathway, both pathways or neither pathway. aldoses glycolysis gluconeogenesis both neither phosphoenolpyruvate carboxykinase glycolysis gluconeogenesis both neither transketolase glycolysis gluconeogenesis both neither pyruvate kinase glycolysis gluconeogenesis both neither phosphoglycerate kinase glycolysis...
In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate is excreted into the blood and returns to the liver. In the liver, lactate is converted back into glucose by gluconeogenesis. For each given enzyme, identify whether it is involved in the glycolysis pathyway, gluconeogenesis pathway, both pathways, or neither pathway. The enzyme aldolase is involved in The enzyme pyruvate carboxylase is involved in neither pathway. the gluconeogenesis pathway. the glycolysis pathway. The enzyme...
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