Biochem Glycogen Metabolism

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Author:
bradley.knox
ID:
185784
Filename:
Biochem Glycogen Metabolism
Updated:
2012-11-27 21:55:03
Tags:
Biochem
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Biochem
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  1. What are the three sources of glucose?
    • Diet
    • Gluconeogenesis
    • Degradation of glycogen
  2. When is muscle glycogen used?
    exercise
  3. What maintains the blood glucose concentration particularly during the early stages of a fast?
    Liver Glycogen
  4. What type of bonds are between each glucose in a single chain?
    1-4
  5. What type of bond is between branches?
    1-6
  6. In what part of the cell does glycogen synthesis and degradation occur?
    Cytoplasm
  7. What form is most glucose found in a cell?
    glucose-6-phosphate
  8. What enzyme is used to convert G-6-P <=> G-1-P (reversible)?
    phosphoglucomutase 
  9. UTP + G-1-P equals what and what enzyme is used?
    • Uridine Diphosphoglucose (UDP) + PPi
    • Enzyme = UDP-Glucose pyrophosphorylase
  10. What enzyme is used to add glucose to the glycogen chain?
    glycogen synthase
  11. If there is no glycogen available to use as a primer for glycogen synthase what is used?
    Glycogenin
  12. What type of carbon has four different groups attached to it?
    Chiral carbon
  13. what type of molecule differ only in their arragnement of atoms in space?
    stereoisomers
  14. sterioisomers that are not mirror reflections of each other?
    Diastereomers
  15. Stereoisomers that are mirror images?
    Enantiomers
  16. What enzyme is used transfer 6-7 residues to start a new branch 6 positions back on the chain?
    4:6 transferase or branching enzyme
  17. What type of bond occurs at the start of the new branch?
    1-6
  18. What is the primary form of glucose that is found during Glycogenolysis?
    Glucose-1-Phosphate
  19. What enzyme breaks the bonds the 1-4 bonds between each glucose in a single cain?
    glycogen phosphorylase
  20. What enzyme transfers 3 of the glucose molecules from the limit dextrin to another branch?
    Debranching enzyme or 4:4 transferase
  21. What enzyme breaks the bond 1-6 bond leaving a free glucose molecule?
    Glucosidase

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