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Questions and Answers
Which enzyme catalyzes the glycosylation of its own tyrosine residue to start glycogen synthesis?
Which enzyme catalyzes the glycosylation of its own tyrosine residue to start glycogen synthesis?
- Glycogenin (correct)
- UDP-glucose
- Tyrosine kinase
- Glycogen synthase
What type of bond does glycogen synthase form between glucoses?
What type of bond does glycogen synthase form between glucoses?
- α 1-4 glycosidic bonds (correct)
- β 1-6 glycosidic bonds
- α 1-6 glycosidic bonds
- β 1-4 glycosidic bonds
What is the role of UDP-glucose in glycogen synthesis?
What is the role of UDP-glucose in glycogen synthesis?
- It donates glucose to the 4' end of a glycogen chain (correct)
- It catalyzes its own glycosylation
- It forms α 1-4 glycosidic bonds between glucoses
- It adds glucose to a tyrosine residue in glycogenin
Can glycogen synthase start the synthesis of a new glycogen molecule?
Can glycogen synthase start the synthesis of a new glycogen molecule?
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What is the phosphate transfer potential of UDP-glucose?
What is the phosphate transfer potential of UDP-glucose?
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What is the name of the protein that starts glycogen synthesis by adding a glucose molecule to its tyrosine residue?
What is the name of the protein that starts glycogen synthesis by adding a glucose molecule to its tyrosine residue?
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Which type of glycosidic bond does glycogenin form between glucoses?
Which type of glycosidic bond does glycogenin form between glucoses?
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What is the property of glycogenin that makes it an enzyme?
What is the property of glycogenin that makes it an enzyme?
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