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Glycogen Phosphorylase
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Questions in this quiz (20)
1Which form of Glycogen Phosphorylase is relatively inactive?
- APhosphorylase A
- BPhosphorylase B
2In phosphorylase B, where is the N terminus?
- AFloating free in the cytoplasm
- BAttached to the protein body
- CUnattached from protein
3Which of the forms of glyocgen phosphorylase is most effected by cellular AMP/ATP levels?
- APhosphorylase A
- BPhosphorylase B
4Which of the following phosphorylates Glycogen Phosphorylase?
- APhosphorylase B Kinase
- BPhosphorylase A Kinase
- CPhosphorylase Kinase
5What protein causes the dephosphorylation of phosphorylase?
- AProtein phosphatase
- BProtein phosphorylase
- CProkein Kinase P
6What is needed for the reaction of Phosphorylase B --> A to reverse itself?
- AWater (and a lack of inhibiting AMP)
- BWater (and a lack of inhibiting ATP)
- CWater (and a lack of inhibiting GMP)
7What is different about Phosphorylase A to B?
- ASer14 has been phosphorylated
- BTyr14 has been phosphorylated
- CThr14 has been phosphorylated
8What difference does phosphorylating Glycogen phosphorylase make?
- AMakes the relaxed form much more likely
- BMakes the taut form much more likely
- CDeactivates it entirely
9How does phosphorylase B Kinase connect Glycogen Phosphorylase levels to the level of stimulation?
- AIt is activated by Ca2+- when the muscle is stimulated, glucose is needed and so glycogen is broken down
- BIt is deactivated by Ca2+- when the muscle is stimulated, glucose is not needed and so glycogen isn't broken down
10What part of Phosphorylase B Kinase binds to Calcium?
- ACalmodulin
- BCalsequestrin
- CTroponin C
11Which parts of phosphorylase B kinase are regulatory?
- AAlpha and beta
- BAlpha and gamma
- CGamma and beta
12Which part of phosphorylase B kinase is catalytic?
- AGamma
- BDelta
- CBeta
13In phosphorylase B kinase's Ca2+ binding sites, what are the affinities?
- A2 high
2 low - B4 high
- C4 low
- A2 high
14What protein causes the phosphorylation of Phosphorylase B Kinase?
- AcAMP dependent Protein Kinase
- BAdenylate Cyclase
- CGlycogen Phosphorylase
15What is another name of cAMP dependent protein kinase?
- AProtein Kinase A
- BProtein Kinase B
- CProtein Kinase C
16What is the role of inhibitor one?
- ATo bind to protein phosphatase, activating it
- BTo bind to protein phosphatase, inhibiting it
- CTo bind to protein kinase A, activating it
17What is contained in the N terminus domain of Glycogen Phosphorylase?
- AThe catalytic site
- BThe allosteric effector site
- CThe regulatory subunit
18How does glycogen get from it's binding domain to the catalytic site?
- AA hydrophobic tunnel
- BA hydrophillic tunnel
- CA lipophobic tunnel
19Why is glycogen phosphorylase's site in a deep groove?
- ATo prevent AMP from entering
- BTo prevent ATP from entering
- CTo prevent water from entering
20What happens if water enters the active site?
- ANothing
- BThe enzyme is deactivated
- CHydrolysis occurs instead of phosphorolysis
Information
- Description
- Year 2 (Insulin & Glucagon) Quiz on Glycogen Phosphorylase, created by gina_evans0312 on 23/10/2013.
- Author
- gina_evans0312
- Language
- English
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- 799
- History
- Created on 23 Oct 2013 · updated on 5 Jan 2017
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