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 9, Problem 42SA
Summary Introduction
To review:
The deficiency of pyruvate carboxylase thatresults in lactic aciduria, an illness where lactate appears in the urine.
Introduction:
In all aerobic living organisms, the citric acid cycle or Kreb’s cycle is present in order to release the energy stored in a 2-carbon acetyl, that is, acetyl-CoA (Coenzyme A) by a series of biochemical reactions. This cycle occurs in the matrix region of mitochondria in a living cell. Acetyl-CoA is formed from the pyruvate in the process of glycolysis and in the catabolism of fatty acids.
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What are the effects of Glucose-6 Phosphate Dehydrogenase Deficiency? Explain its mechanism of action.
Name the key enzymes of gluconeogenesis. Explain how lactate is converted to glucose.
what is the oxidative decarboxylation of pyruvate?
Chapter 9 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 9 - Prob. 1QCh. 9 - Prob. 2QCh. 9 - Prob. 3QCh. 9 - Prob. 4QCh. 9 - Prob. 5QCh. 9 - Prob. 6QCh. 9 - Prob. 7QCh. 9 - Prob. 1RQCh. 9 - Prob. 2RQCh. 9 - Prob. 3RQ
Ch. 9 - Prob. 4RQCh. 9 - Prob. 5RQCh. 9 - Prob. 6RQCh. 9 - Prob. 7RQCh. 9 - Prob. 8RQCh. 9 - Prob. 9RQCh. 9 - Prob. 10RQCh. 9 - Prob. 11RQCh. 9 - Prob. 12RQCh. 9 - Prob. 13RQCh. 9 - Prob. 14RQCh. 9 - Prob. 15RQCh. 9 - Prob. 16RQCh. 9 - Prob. 17RQCh. 9 - Prob. 18RQCh. 9 - Prob. 19RQCh. 9 - Prob. 20RQCh. 9 - Prob. 21RQCh. 9 - Prob. 22RQCh. 9 - Prob. 23RQCh. 9 - Prob. 24RQCh. 9 - Prob. 25RQCh. 9 - Prob. 26RQCh. 9 - Prob. 27RQCh. 9 - Prob. 28FBCh. 9 - Prob. 29FBCh. 9 - Prob. 30FBCh. 9 - Prob. 31FBCh. 9 - Prob. 32FBCh. 9 - Prob. 33FBCh. 9 - Prob. 34FBCh. 9 - Prob. 35FBCh. 9 - Prob. 36FBCh. 9 - Prob. 37FBCh. 9 - Prob. 38SACh. 9 - Prob. 39SACh. 9 - Prob. 40SACh. 9 - Prob. 41SACh. 9 - Prob. 42SACh. 9 - Prob. 43TQCh. 9 - Prob. 44TQCh. 9 - Prob. 45TQCh. 9 - Prob. 46TQCh. 9 - Prob. 47TQCh. 9 - Prob. 48TQCh. 9 - Prob. 49TQCh. 9 - Prob. 50TQCh. 9 - Prob. 51TQCh. 9 - Prob. 52TQCh. 9 - Prob. 53TQCh. 9 - Prob. 54TQCh. 9 - Prob. 55TQCh. 9 - Prob. 56TQCh. 9 - Prob. 57TQCh. 9 - Prob. 58TQCh. 9 - Prob. 59TQ
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Similar questions
- The disease beriberi, which results from a dietary deficiency of vitamin B1 (thiamine), is characterized by neurologic and cardiac symptoms, as well as increased levels of pyruvate and a-ketoglutarate in the blood. How does a deficiency of thiamine account for the increased levels of pyruvate and a-ketoglutarate?arrow_forwardIn what condition and why is pyruvate converted to lactate?arrow_forwardWhy are the enzymes α-Amylase and α-glucosidase active in a patient with hyperglycemia or diabetes? How do they become activated?arrow_forward
- Name the molecules used for gluconeogenesis. What are the sources of these molecules? Under what conditions would gluconeogenesis occur?arrow_forwardWhat is the effect on gluconeogenesis and glycogen synthesis of (a) increasing the level of ATP, (b) decreasing the concentration of fructose-1,6- bisphosphate, and (c) increasing the concentration of fructose-6- phosphate?arrow_forwardWhat is the role of pyruvate dehydrogenase and what are its products?arrow_forward
- What is the rule of 2 for gluconeogenesis ?arrow_forwardWhat are the diseases a-ketoglutarate dehydrogenase deficiency, succinate dehydrogenase deficiency, and fumarase deficiency? and why most of these disease clinical features of these diseases involve muscle and nerve tissue?arrow_forwardPyruvate dehydrogenase deficiency, a severe condition with a poor prognosis, results in neurological dysfunction and unremitting lactic acidosis. One treatment is placing the patients on a low carbohydrate/high fat diet. ( a) Explain why the deficiency would be characterized by neurological dysfunction. ( b) Why does lactic acidosis result? ( c) Explain the rationale for the low carbohydrate/high fat diet.arrow_forward
- How are the irreversible reactions of glycolysis bypassed in gluconeogenesis?arrow_forwardWhy is pyruvate carboxylase constitutive and active in both glycolysis and gluconeogenesis?arrow_forwardVon Gierke’s disease is a rare genetic disorder that results in a deficiency of glucose-6-phosphatase. Symptoms ketoacidosis, a buildup of glycogen in the liver, and lactate buildup. Why does this glycogen storage disease not affect the brain? a) The brain is able to still perform glycolysis effectively b) None of the above c) In the event of hypoglycemia, the brain is able to utilize other sources of energy to produce ATP d) The brain is able to metabolize lactate, which is present in high concetrations.arrow_forward
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