Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 13, Problem 34RQ
Summary Introduction
To review:
The reason behind the depression of photorespiration due to carbon dioxide (CO2).
Introduction:
Photorespiration is the process by which plants intake oxygen and release carbon dioxide. It is a light-dependent process and occurs simultaneously with photosynthesis. Photorespiration is only found inC3 plant.
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Pyruvate is accepted into the TCA cycle by a “feeder” reaction using the pyruvatedehydrogenase complex, resulting in acetyl-CoA and CO2. Provide a full mechanismfor this reaction utilizing the TPP cofactor. Include the roles of all cofactors.
B- Vitamins are converted readily into important metabolic cofactors. Deficiency inany one of them has serious side effects.
a. The disease beriberi results from a vitamin B 1 (Thiamine) deficiency and ischaracterized by cardiac and neurological symptoms. One key diagnostic forthis disease is an increased level of pyruvate and α-ketoglutarate in thebloodstream. How does this vitamin deficiency lead to increased serumlevels of these factors?
b. What would you expect the effect on the TCA intermediates for a patientsuffering from vitamin B 5 deficiency?
c. What would you expect the effect on the TCA intermediates for a patientsuffering from vitamin B 2 /B 3 deficiency?
Draw the Krebs Cycle and show the entry points for the amino acids Alanine,Glutamic Acid, Asparagine, and Valine into the Krebs Cycle - (Draw the Mechanism).
How many rounds of Krebs will be required to waste all Carbons of Glutamic Acidas CO2?
Chapter 13 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 13 - Prob. 1QCh. 13 - Prob. 2QCh. 13 - Prob. 3QCh. 13 - Prob. 4QCh. 13 - Prob. 5QCh. 13 - Prob. 6QCh. 13 - Prob. 7QCh. 13 - Prob. 1RQCh. 13 - Prob. 2RQCh. 13 - Prob. 3RQ
Ch. 13 - Prob. 4RQCh. 13 - Prob. 5RQCh. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - Prob. 8RQCh. 13 - Prob. 9RQCh. 13 - Prob. 10RQCh. 13 - Prob. 11RQCh. 13 - Prob. 12RQCh. 13 - Prob. 13RQCh. 13 - Prob. 14RQCh. 13 - Prob. 15RQCh. 13 - Prob. 16RQCh. 13 - Prob. 17RQCh. 13 - Prob. 18RQCh. 13 - Prob. 19RQCh. 13 - Prob. 20RQCh. 13 - Prob. 21RQCh. 13 - Prob. 22RQCh. 13 - Prob. 23RQCh. 13 - Prob. 24RQCh. 13 - Prob. 25RQCh. 13 - Prob. 26RQCh. 13 - Prob. 27RQCh. 13 - Prob. 28RQCh. 13 - Prob. 29RQCh. 13 - Prob. 30RQCh. 13 - Prob. 31RQCh. 13 - Prob. 32RQCh. 13 - Prob. 33RQCh. 13 - Prob. 34RQCh. 13 - Prob. 35RQCh. 13 - Prob. 36RQCh. 13 - Prob. 37RQCh. 13 - Prob. 38RQCh. 13 - Prob. 39RQCh. 13 - Prob. 40RQCh. 13 - Prob. 41FBCh. 13 - Prob. 42FBCh. 13 - Prob. 43FBCh. 13 - Prob. 44FBCh. 13 - Prob. 45FBCh. 13 - Prob. 46FBCh. 13 - Prob. 47FBCh. 13 - Prob. 48FBCh. 13 - Prob. 49FBCh. 13 - Prob. 50FBCh. 13 - Prob. 51SACh. 13 - Prob. 52SACh. 13 - Prob. 53SACh. 13 - Prob. 54SACh. 13 - Prob. 55SACh. 13 - Prob. 56TQCh. 13 - Prob. 57TQCh. 13 - Prob. 58TQCh. 13 - Prob. 59TQCh. 13 - Prob. 60TQCh. 13 - Prob. 61TQCh. 13 - Prob. 62TQCh. 13 - Prob. 63TQCh. 13 - Prob. 64TQCh. 13 - Prob. 65TQCh. 13 - Prob. 66TQCh. 13 - Prob. 67TQCh. 13 - Prob. 68TQCh. 13 - Prob. 69TQCh. 13 - Prob. 70TQCh. 13 - Prob. 71TQCh. 13 - Prob. 72TQCh. 13 - Prob. 73TQCh. 13 - Prob. 74TQ
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