Glycogen phosphorylase in the liver... A. is the same enzyme that acts in the muscle. B. is mostly found in the so-called 'b' state C. converts glycogen to UDP-glycose D. is slowed down when you eat a sugar-rich dessert. E. is more active when protein phosphatase 1 is also active F. A and B G. A and C H. A and D I. A and E J. A and B Glycogen synthase A. needs glucose-6-phosphate as a substrate. B. is activated by protein phosphatase 1 C. is most active after eating a lot of cake at a wedding D. is activated by glycogen synthase kinase E. A and C F. B and C G. A and D H. A and B. ♡ Protein phosphatase 1, under conditions of high blood glucose... phosphorylates glycogen synthase b phosphorylates glycogen phosphorylase b removes a phosphate from phosphorylase kinase

Glycogen phosphorylase in the liver... A. is the same enzyme that acts in the muscle. B. is mostly found in the so-called 'b' state C. converts glycogen to UDP-glycose D. is slowed down when you eat a sugar-rich dessert. E. is more active when protein phosphatase 1 is also active F. A and B G. A and C H. A and D I. A and E J. A and B Glycogen synthase A. needs glucose-6-phosphate as a substrate. B. is activated by protein phosphatase 1 C. is most active after eating a lot of cake at a wedding D. is activated by glycogen synthase kinase E. A and C F. B and C G. A and D H. A and B. ♡ Protein phosphatase 1, under conditions of high blood glucose... phosphorylates glycogen synthase b phosphorylates glycogen phosphorylase b removes a phosphate from phosphorylase kinase

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter4: How Cells Obtain Energy

Section: Chapter Questions

Problem 13RQ: Beta oxidation is ______. a. the breakdown of sugars b. the assembly of sugars c. the breakdown of...

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Which of the following statements regarding glycogen are true? A. Glucose from glycogen can be metabolized anaerobically B. Approximately 1-2% of muscle weight is glycogen, whereas 10-15% of liver weight is glycogen C. It is faster for the muscle to obtain energy from glycogen than from lipids D. A and B are true E. B and C are true F. Both A, B, and C are true
Which of the following statements concerning glycogen in different tissues is TRUE? a. Liver glycogen serves as a fuel reserve for ATP synthesis during muscle contraction. b. Brain glycogen serves as a source of blood glucose. c. Red blood cells use glycogen as a source of blood glucose. d. Muscle glycogen serves as a fuel reserve for ATP synthesis during muscle contraction. e. Muscle glycogen serves as a source of blood glucose.
When unlimited energy (glucose = 100 and fat = 100) is available and pyruvate processing is inhibited (100%), the citric acid cycle (CAC) runs at a _________ rate. a, Low (1 - 30%) b, Stops (1% or less) c, Moderate (31 - 70%) d, High (71 - 100%)
What would most likely promote increased rates of glycolysis? Select one: a. a higher concentration of Na in the environment compared to cells b. a higher concentration of K in cells compared to the environment c. a high concentration of ATP in cells d. a low concentration of ATP in cells e. presence of oxygen in cells
What is the first step in glycogen degradation? a) remodeling of the glycogen substrate b) activation of the T state of phosphorylase b c) release of glucose 1-phosphate from glycogen d) formation of glucose 6-phosphate from glucose 1-phosphate e) isomerization of glucose 1-phosphate to glucose 6-phosphate
Human Adipose (Fat) cells: a. store glycogen as a long-term energy reserve b. store triglycerides as a long-term energy reserve c. release triglycerides when the human body is in prolonged “energy deficit” (more calories used than calories eaten) d. increase or decrease the size of their lipid droplet depending on how many calories you eat, but never go away e. store large amounts of NADH to support metabolism during periods when our muscles cannot get enough oxygen to carry out oxidative phosphorylation
Which of the following activate glycogen synthesis? A. Phosphorylation of glycogen synthase kinase 3 B. Activation of protein kinase A (PKA) C. Both A and B D. Neither A nor B Assuming that glucokinase is completely inhibited, which of the following statements is correct? Glycolysis reactions beyond glucose-6-phosphate in the liver would be impossible to take place The Cori cycle would be blocked Both A and B Neither A nor B
In the Alanine Cycle, different organs work together to produce glucose from protein. Which statement below best describes what happens in which organ? a)In liver, pyruvate is transaminated to alanine; in the muscle, alanine is deaminated and pyruvate is used for ATP synthesis. b)In muscle, pyruvate is transaminated to alanine; in the liver, alanine is deaminated and pyruvate is used for gluconeogenesis. c)The liver exports glucose for use by the brain; in the muscle, alanine is deaminated by the urea cycle for use in ATP generation. d)In muscle, pyruvate is transaminated to alanine; in the liver, alanine enters the urea cycle for excretion.
For an individual whose liver is regulated to have gluconeogenesis on and glycolysis off, when energy is needed - what is the major carbon source used to produce acetyl CoA? a. amino acids b. glyoxylate c. glucose d. fatty acids
Fatty acids are broken down toa. pyruvate molecules, which take electrons to the electrontransport chain.b. acetyl groups, which enter the citric acid cycle.c. amino acids, which excrete ammonia.d. glycerol, which is found in fats.e. All of these are correct.
More energy is captured during the catabolic oxidation of an 18-carbon fatty acid than the catabolic oxidation of three 6-carbon glucose molecules because: a. glucose oxidation captures energy in the form of FADH2 whereas fatty acid oxidation captures energy in the form of ATP b. a fatty acid is at a higher energy point on the oxidation series of carbon than glucose c. a fatty acid is a more reduced substance than glucose which is partially oxidized d. the oxidation of an 18-carbon fatty acid produces 9 acetyl CoA molecules that go through the TCA Cycle, whereas the oxidation of three 6-carbon glucose molecules produce 6 acetyl CoA molecules that go through the TCA cycle e. energy capture from glucose oxidation is only 15% efficient whereas energy capture from fatty acid oxidation is 42% efficient
Which of the following would contribute to “glycogen sparing/preservation” during prolonged exercise? a. Dietary consumption of glucose during the exercise bout b. Cori cycle c. An increase in the number of mitochondria in the skeletal muscle d. All of the above e. Only B and C are correct