The immediate product of glycogen phosphorylase is: a. Glucose 6-phosphate. b. Glucose 1-phosphate. c. Fructose 1-phosphate. d. Glucose 1,6-bisphosphate
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The immediate product of glycogen phosphorylase is:
a. Glucose 6-phosphate.
b. Glucose 1-phosphate.
c. Fructose 1-phosphate.
d. Glucose 1,6-bisphosphate
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- Which of the following is a substrate for glycogen synthase? a. UTP-glucose b. Glucose 1-phosphate c. CDP-glucose d. UDP-glucoseAmylo-1,6-glucosidase is called a. Glucantransferase b. Debranching enzyme c. Phosphorylase d. Branching enzymeA patient complains of painful muscle cramps when performing strenuous physical exercise. A muscle biopsy indicates a higher than normal concentration of muscle glycogen. a. Which enzyme of glycogen metabolism is affected? b. Discuss how the defect of this enzyme affects glycogen metabolism.
- what effect would an increase in glucose typically have on the activity of glycogen synthaseIn the glycogen synthase reaction, the precursor to glycogen is a. Glucose-1-P b. UDP-glucose c. UTP-glucose d. Glucose-6-PThe enzyme phosphoglycerate mutase promotes which of the following? a. the hydrolysis of 3-phosphoglycerate b. the isomerization of 3-phosphoglycerate c. the oxidation of 3-phosphoglycerate d. the reduction of 3-phosphoglycerate
- Which enzyme activity of the glycogen debranching enzyme is operating during the release of glucose units linked to glycogen branchpoints via o1,6 glycosidic linkage? a. transferase activity b. phosphorylase activity c. phosphatase activity d. glucosidase activityWhat 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-phosphateGlucose binds to glycogen phosphorylase and competitively inhibits the enzyme. What is the physiological advantage of this?
- Which of the following is NOT a physiological role of phosphorus? Select one: a. Required for ossification of bones during embryonic development b. Required for enzymatic conversions in glycolysis c. Links together ribose sugars and their associated nitrogenous bases d. Important compound required to inhibit auto-oxidation of fatty acidsDuring glycogen synthesis in vertebrates, _____ is added to the growing chain by glycogen synthase. Select one: a. glucose 1-phosphate b. UDP-glucose c. ADP-glucose d. glucoseThe pentose phosphate pathway is an alternative pathway of glucose oxidation.(a). Give the two main products of this pathway.(b). Name the enzyme that controls this pathway. The deficiency of this enzyme is sometimes inherited from the parents. What do these patients suffer from?(c). How is this pathway related to nucleotide metabolism?