Mitochondria and Cellular Damage Quiz
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Questions and Answers

What is the approximate number of mitochondria per cell?

  • More than 5000
  • Several hundred to 2000 (correct)
  • Exactly 1000
  • Less than a hundred

What is the source of energy production in mitochondria?

  • Protein synthesis
  • DNA replication
  • Glycolysis
  • Citrate cycle and fatty acid oxidation (correct)

What happens to mitochondrial DNA copy number with aging or disease?

  • It remains constant
  • It increases
  • It decreases (correct)
  • It becomes unstable

What is the consequence of defects in ATP production in mitochondria?

<p>Neuronal deficits due to lack of energy (B)</p> Signup and view all the answers

What is the primary function of mitochondria in a cell?

<p>Energy production (D)</p> Signup and view all the answers

Study Notes

Mitochondria Structure and Function

  • The approximate number of mitochondria per cell varies, but it can range from 100 to 1,000, depending on the cell type and energy demands.

Energy Production in Mitochondria

  • The source of energy production in mitochondria is oxidative phosphorylation, where cells convert glucose into ATP (adenosine triphosphate) through cellular respiration.
  • Mitochondria are often referred to as the "powerhouses" of the cell because they generate most of the energy that the cell needs to function.

Mitochondrial DNA and Aging/Disease

  • Mitochondrial DNA copy number tends to decrease with aging or disease, leading to impaired mitochondrial function and energy production.

Consequences of ATP Production Defects

  • Defects in ATP production in mitochondria can lead to cellular energy deficiency, which can cause a wide range of diseases, including neurodegenerative disorders, metabolic disorders, and cancer.

Primary Function of Mitochondria

  • The primary function of mitochondria in a cell is to generate energy for the cell through the production of ATP, which is essential for various cellular processes, such as muscle contraction, nerve impulses, and cell division.

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Test your knowledge about mitochondria, their structure, function, and the types of damage they can sustain such as increased ROS production and DNA damage.

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