Podcast
Questions and Answers
Which enzyme is the regulatory enzyme in glycogenesis?
Which enzyme is the regulatory enzyme in glycogenesis?
- Glycogen phosphorylase
- Glycogen branching enzyme
- Glycogen debranching enzyme
- Glycogen synthase (correct)
What are the two forms of glycogen synthase?
What are the two forms of glycogen synthase?
- Active “a” and inactive “b” (correct)
- Active “a” and inactive “c”
- Active “b” and inactive “c”
- Active “b” and inactive “d”
What is the effect of phosphorylation on glycogen synthase?
What is the effect of phosphorylation on glycogen synthase?
- It activates the enzyme
- It has no effect on the enzyme
- It inactivates the enzyme (correct)
- It converts the enzyme into a different enzyme
What enzyme can convert glycogen synthase “b” back to the “a” form?
What enzyme can convert glycogen synthase “b” back to the “a” form?
What is the relationship between the level of inactivation of glycogen synthase and the degree of phosphorylation?
What is the relationship between the level of inactivation of glycogen synthase and the degree of phosphorylation?
What is the active form of glycogen synthase?
What is the active form of glycogen synthase?
What is the inactive form of glycogen synthase?
What is the inactive form of glycogen synthase?
What is the process by which glycogen synthase “b” is converted back to the “a” form?
What is the process by which glycogen synthase “b” is converted back to the “a” form?
What is the effect of the level of inactivation of glycogen synthase on glycogenesis?
What is the effect of the level of inactivation of glycogen synthase on glycogenesis?
What is the effect of protein phosphatase-1 on glycogen synthase?
What is the effect of protein phosphatase-1 on glycogen synthase?
Which enzyme is the regulatory enzyme in glycogenesis?
Which enzyme is the regulatory enzyme in glycogenesis?
What are the two forms of glycogen synthase?
What are the two forms of glycogen synthase?
What is the effect of phosphorylation on glycogen synthase?
What is the effect of phosphorylation on glycogen synthase?
What enzyme can convert glycogen synthase “b” back to the “a” form?
What enzyme can convert glycogen synthase “b” back to the “a” form?
What is the relationship between the level of inactivation of glycogen synthase and the degree of phosphorylation?
What is the relationship between the level of inactivation of glycogen synthase and the degree of phosphorylation?
What is the active form of glycogen synthase?
What is the active form of glycogen synthase?
What is the inactive form of glycogen synthase?
What is the inactive form of glycogen synthase?
What is the process by which glycogen synthase “b” is converted back to the “a” form?
What is the process by which glycogen synthase “b” is converted back to the “a” form?
What is the effect of the level of inactivation of glycogen synthase on glycogenesis?
What is the effect of the level of inactivation of glycogen synthase on glycogenesis?
What is the effect of protein phosphatase-1 on glycogen synthase?
What is the effect of protein phosphatase-1 on glycogen synthase?
Which enzyme is the regulatory enzyme in glycogenesis?
Which enzyme is the regulatory enzyme in glycogenesis?
What are the two forms of glycogen synthase?
What are the two forms of glycogen synthase?
How is glycogen synthase 'a' converted to the 'b' form?
How is glycogen synthase 'a' converted to the 'b' form?
What is the level of inactivation of glycogen synthase 'b' proportional to?
What is the level of inactivation of glycogen synthase 'b' proportional to?
Which enzyme can reconvert glycogen synthase 'b' to the 'a' form?
Which enzyme can reconvert glycogen synthase 'b' to the 'a' form?
What is the role of glycogen synthase in glycogenesis?
What is the role of glycogen synthase in glycogenesis?
What is the difference between glycogen synthase 'a' and 'b'?
What is the difference between glycogen synthase 'a' and 'b'?
What is the effect of protein phosphatase-1 on glycogen synthase 'b'?
What is the effect of protein phosphatase-1 on glycogen synthase 'b'?
What is the relationship between the level of phosphorylation and the level of inactivation of glycogen synthase 'b'?
What is the relationship between the level of phosphorylation and the level of inactivation of glycogen synthase 'b'?
What is the effect of phosphorylation on glycogen synthase 'a'?
What is the effect of phosphorylation on glycogen synthase 'a'?
Flashcards
Glycogen Synthase
Glycogen Synthase
The enzyme that controls the synthesis of glycogen from glucose.
Active form of Glycogen Synthase
Active form of Glycogen Synthase
Glycogen Synthase 'a' - the form that synthesizes glycogen.
Inactive form of Glycogen Synthase
Inactive form of Glycogen Synthase
Glycogen Synthase 'b' – the form that doesn't synthesize glycogen.
Phosphorylation
Phosphorylation
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Dephosphorylation
Dephosphorylation
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Protein Phosphatase-1
Protein Phosphatase-1
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Effect of Phosphorylation on Glycogen Synthase
Effect of Phosphorylation on Glycogen Synthase
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Phosphorylation and Glycogen Synthase Inactivation
Phosphorylation and Glycogen Synthase Inactivation
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Effect of Protein Phosphatase-1 on Glycogen Synthase
Effect of Protein Phosphatase-1 on Glycogen Synthase
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Glycogenesis
Glycogenesis
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Effect of Glycogen Synthase Inactivation on Glycogenesis
Effect of Glycogen Synthase Inactivation on Glycogenesis
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Glycogen Synthase 'a' vs. 'b'
Glycogen Synthase 'a' vs. 'b'
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Study Notes
Glycogen Synthase and Glycogenesis
- Glycogen synthase is the regulatory enzyme in glycogenesis.
- There are two forms of glycogen synthase: 'a' (active form) and 'b' (inactive form).
Phosphorylation and Glycogen Synthase
- Phosphorylation of glycogen synthase 'a' leads to its conversion to the 'b' form.
- The level of inactivation of glycogen synthase 'b' is proportional to the degree of phosphorylation.
Conversion of Glycogen Synthase 'b' to 'a'
- Protein phosphatase-1 can reconvert glycogen synthase 'b' back to the 'a' form.
- The process of converting glycogen synthase 'b' back to 'a' involves dephosphorylation.
Effects of Glycogen Synthase Inactivation
- The level of inactivation of glycogen synthase affects glycogenesis, with higher levels of inactivation resulting in decreased glycogenesis.
- Protein phosphatase-1 has a positive effect on glycogen synthase, reactivating it.
Role of Glycogen Synthase
- Glycogen synthase plays a crucial role in glycogenesis, catalyzing the formation of glycogen from glucose.
- The difference between glycogen synthase 'a' and 'b' lies in their activity, with 'a' being active and 'b' being inactive.
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Description
Test your knowledge of glycogenesis with this quiz! Learn about the regulatory enzyme, glycogen synthase, and its active and inactive forms. Explore the process of phosphorylation and how it affects the activity of the enzyme. Challenge yourself to identify how glycogen synthase "b" can be converted back to the active "a" form. Perfect for students and professionals in the fields of biochemistry and metabolism.
