Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl- COA. Acetyl- CoA is further metabolized in the Krebs cycle. A researcher measured the accumulation of acetyl- CoA in a reaction containing pyruvate and pyruvate dehydrogenase under several different conditions. Pyruvate dehydrogenase deficiency is a genetic disease most commonly linked to a mutation in the a- subunit of the mitochondrial enzyme that causes the enzyme to cease functioning. Because of this mutation, individuals that are affected build up dangerous amounts of lactic acid How can vou exnlain the buildun of lantio

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
icon
Related questions
icon
Concept explainers
Question
Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl- COA.
Acetyl- CoA is further metabolized in the Krebs cycle. A researcher measured
the accumulation of acetyl- CoA in a reaction containing pyruvate and pyruvate
dehydrogenase under several different conditions. Pyruvate dehydrogenase
deficiency is a genetic disease most commonly linked to a mutation in the a-
subunit of the mitochondrial enzyme that causes the enzyme to cease
functioning. Because of this mutation, individuals that are affected build up
dangerous amounts of lactic acid. How can you explain the buildup of lactic acid
when someone has this mutation? *
70T
60-
50-
40
30
20
Acetyl-CoA
micromoles)
Transcribed Image Text:Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl- COA. Acetyl- CoA is further metabolized in the Krebs cycle. A researcher measured the accumulation of acetyl- CoA in a reaction containing pyruvate and pyruvate dehydrogenase under several different conditions. Pyruvate dehydrogenase deficiency is a genetic disease most commonly linked to a mutation in the a- subunit of the mitochondrial enzyme that causes the enzyme to cease functioning. Because of this mutation, individuals that are affected build up dangerous amounts of lactic acid. How can you explain the buildup of lactic acid when someone has this mutation? * 70T 60- 50- 40 30 20 Acetyl-CoA micromoles)
Condition 1
Condition 2
Condition 3
Figure 1. Accumulation of acetyl-CoA under different conditions
O Cells undergo glycolysis because there is a buildup of pyruvate in affected individuals.
Cells undergo fermentation because pyruvate cannot be metabolized to proceed into
the Krebs cycle.
Cells use lactic acid to shunt electrons from pyruvate to the electron transport chain
in the mitochondria.
Cells cannot transport pyruvate to the mitochondria in the absence of pyruvate
dehydrogenase activity, so the pyruvate is broken down to lactic acid and ethanol.
following auestions can best be answered by the diagram?
Transcribed Image Text:Condition 1 Condition 2 Condition 3 Figure 1. Accumulation of acetyl-CoA under different conditions O Cells undergo glycolysis because there is a buildup of pyruvate in affected individuals. Cells undergo fermentation because pyruvate cannot be metabolized to proceed into the Krebs cycle. Cells use lactic acid to shunt electrons from pyruvate to the electron transport chain in the mitochondria. Cells cannot transport pyruvate to the mitochondria in the absence of pyruvate dehydrogenase activity, so the pyruvate is broken down to lactic acid and ethanol. following auestions can best be answered by the diagram?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Metabolic pathways
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education