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Glycolysis and Krebs Cycle

See attached file.

Answer 1, 2 and 6

1. Both glycogen and cellulose are polyglucose molecules.
a. Draw the basic structure of each (two glucose units in the main chain and one in the branch is sufficient), numbering all atoms
b. Compare and contrast the function of these related compounds
c. What is/are the molecular reasons for this functional difference?
d. How do you suppose a cell can make these two separate molecules without making errors such as glycogen-cellulose hybrid molecules?

2. Diagram the pathway of Glycolysis from glucose to pyruvate, giving structures and names of all pathway intermediates (enzyme mechanisms are not required) and names of enzymes (no abbreviations). Indicate where ADP, ATP, Pi, NAD+, or NADH is a substrate or product of a reaction.

6. Diagram the Krebs Citric Acid Cycle, beginning with pyruvate, giving structures and names of all enzyme substrates and products and names of enzymes (no abbreviations). Include on your diagram where (see attached file) where coenzyme A, H2O, or CO2 are substrates or products of reactions.

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MBioS 301 Spring 2009
ANSWER THREE OF THE FOLLOWING:
Points will be deducted for illegible structures!

1. Both glycogen and cellulose are polyglucose molecules.
a. Draw the basic structure of each (two glucose units in the main chain and one in the branch is sufficient), numbering all atoms

Glycogen:

The structure shows glucose units linked to each other via alpha acetal linkage and each alpha acetal link connects C1 of one glucose molecule to C4 of the next glucose molecule.
Cellulose:

b. Compare and contrast the function of these related compounds

cellulose is a linear polymer of glucose ...

Solution Summary

Solution provides detailed answers for the question number 1, 2 and 6 regarding glucose, glycogen, glycolysis and krebs cycle.

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