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8 Cards in this Set

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Explain the breakdown of glycogen
A phosphorus ion attacks the glycogen at the non reducing end. this phosphorlysis occurs at the a 1,4 bonds. To produce G1P. An isomerase rxn occurs, producing G6P for glycolysis
Why would you classify conversion of glycogen to glucose-6-phosphate as catabolic?
I would not classify this process as catabolic, it is anabolic!
It produces ATP.
It oxidizes carbon.
It converts a complex molecule to a simple molecule.
B, C, and D.
converts complex molecule to a simple molecule
What needs to happen to glucose for glycogen to be synthesized?
It must be activated
How does the glucose activation for glycogen synthesis work?
G6P is converted to G1P by phosphoglyceromutase. two P are cleaved from UTP to form UMP. THis ends up being an extremely exergonic reaction that drives the binding of G1P and UMP. G1P is added to glycogen chain
When glucose is added to glycogen entropy ____?

Increases
Decreases
I need help with this!
it decreases
2Pyruvate + 4ATP + 2GTP + 2NADH + 2H+ + 4H2O  Glucose + 4ADP + 2GTP + 6Pi + 2NAD+

Based on general metabolic principles, which statements are true?
i) Producing glucose from pyruvate is endergonic.
ii) Carbon is oxidized in this reaction.
iii) This is a catabolic pathway.

A. i and ii B. ii and iii C. i and iii D. only i E. only ii
2Pyruvate + 4ATP + 2GTP + 2NADH + 2H+ + 4H2O  Glucose + 4ADP + 2GTP + 6Pi + 2NAD+

Based on general metabolic principles, which statements are true?
i) Producing glucose from pyruvate is endergonic.
ii) Carbon is oxidized in this reaction.
iii) This is a catabolic pathway.

A. i and ii B. ii and iii C. i and iii D. only i E. only ii
D
Which of these reactions would be easily reversible by changes in the cellular concentrations of the substrates and products?
i) PEP + ADP  Pyruvate + ATP G = -5.5 kcal/mol
ii) 1,3-BPG + ADP  3-PG + ATP G = +0.023 kcal/mol
iii) Glucose + ATP  G-6-P + ADP G = -8.1 kcal/mol
iv) F-1,6-BP  DHAP + G-3-P G = -0.057 kcal/mol


A. ii B. i and ii C. ii and iv D. iv E. i, ii, and iii
C
Gluconeogenesis oxidizes/reduces carbons?
reduces