Studies on human aging have shown that the levels of coenzyme Q10 (ubiquinone), measured in tissues such as heart muscle, are significantly lower in individuals over 70 years old than in younger individuals. This lower level is associated with significantly reduced contractile force of their heart muscle. Which is the most likely explanation for the reduced heart muscle function in these older individuals? Coenzyme Q10 is an uncoupling protein found in mitochondria; lower levels of it will result in less efficient mitochondria. Coenzyme Q10 is used to convert pyruvate to acetyl CoA; lower levels of it will result in a less efficient citric acid cycle, which will slow down the production of ATP. Coenzyme Q10 is an electron carrier in the electron transport chain in mitochondria; lower levels of it will result in less ATP being made by mitochondria during cellular respiration. Coenzyme Q10 is a lipid found in brown fat; brown fat is a major source of energy for all tissues in the body. Coenzyme Q10 is used in cleaving a 6-carbon sugar into two 3-carbon sugars during glycolysis; lower levels of it will result in lower amounts of ATP being produced.

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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Studies on human aging have shown that the levels of coenzyme Q10 (ubiquinone), measured in tissues such as heart
muscle, are significantly lower in individuals over 70 years old than in younger individuals. This lower level is associated
with significantly reduced contractile force of their heart muscle. Which is the most likely explanation for the reduced heart
muscle function in these older individuals?
Coenzyme Q10 is an uncoupling protein found in mitochondria; lower levels of it will result in less efficient
mitochondria.
Coenzyme Q10 is used to convert pyruvate to acetyl CoA; lower levels of it will result in a less efficient citric acid cycle,
which will slow down the production of ATP.
Coenzyme Q10 is an electron carrier in the electron transport chain in mitochondria; lower levels of it will result in less
ATP being made by mitochondria during cellular respiration.
Coenzyme Q10 is a lipid found in brown fat; brown fat is a major source of energy for all tissues in the body.
Coenzyme Q10 is used in cleaving a 6-carbon sugar into two 3-carbon sugars during glycolysis; lower levels of it will
result in lower amounts of ATP being produced.
Transcribed Image Text:Studies on human aging have shown that the levels of coenzyme Q10 (ubiquinone), measured in tissues such as heart muscle, are significantly lower in individuals over 70 years old than in younger individuals. This lower level is associated with significantly reduced contractile force of their heart muscle. Which is the most likely explanation for the reduced heart muscle function in these older individuals? Coenzyme Q10 is an uncoupling protein found in mitochondria; lower levels of it will result in less efficient mitochondria. Coenzyme Q10 is used to convert pyruvate to acetyl CoA; lower levels of it will result in a less efficient citric acid cycle, which will slow down the production of ATP. Coenzyme Q10 is an electron carrier in the electron transport chain in mitochondria; lower levels of it will result in less ATP being made by mitochondria during cellular respiration. Coenzyme Q10 is a lipid found in brown fat; brown fat is a major source of energy for all tissues in the body. Coenzyme Q10 is used in cleaving a 6-carbon sugar into two 3-carbon sugars during glycolysis; lower levels of it will result in lower amounts of ATP being produced.
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