The activated form of glucose that serves as glucose donor for glycogen synthesis is formed by the reaction of UTP and glucose 6-phosphate. O True False
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- Phosphoglucomutase is crucial for glycogen breakdown as well as for glycogen synthesis. Explain the role of this enzyme in each of the two processes.The complete oxidation of glucose 6-phosphate derived from free glucose yields 30 molecules ATP, whereas the complete oxidation of glucose 6- phosphate derived from glycogen yields 31 molecules of ATP. Account for this difference.Glycogen synthase may be regulated by covalent modification and/or allosteric control. Label the diagram with the appropriate terms to describe glycogen synthase regulation. Use the following options: Glucose-6-Phospate; Insulin; Fructose-2,6-Bisphosphate; Phosphorylation, Dephosphorylation
- The enzyme involved in the successive cleavage of one glucose unit from the non-reducing end of glycogen during glycogenolysis is (Abbreviation and wrong spelling will not be accepted.)High amount of citrate decreases the activity of fructose 1,6-bisphosphatase. True or FalseAt normal to low blood glucose concentrations (1.e., roughly 110 mg/dl or less), the enzyme that is responsible for sequestering or trapping glucose within cells is which of the following enzymes? O hexokinase O glycogen synthase O glucose-6-phosphatase O glucokinase
- True or false, Glycogenin is a protein that serves as the base upon which a new molecule of glycogen is built, but it still relies on the enzyme glycogen synthase to form all O-glycosidic bonds between glucose residues.fill in the blank Alanine can enter gluconeogenesis as an alternative carbon source for glucose as ( ).Why is it that only 2ATP molecules are required to store one glucose molecule as glycogen?
- true or false The lactase enzyme can be induced by slowly introducing lactose into the diet of a lactose intolerant person.what effect would an increase in glucose typically have on the activity of glycogen synthaseThe binding of insulin to its receptor on the surface of a target cell activates the receptor’s tyrosine kinase activity, which in turn causes several phosphorylation cascades that alter the activity of numerous enzymes as well as the expression of specific genes. Describe how one of these phosphorylation cascades stimulates glycogen synthesis.