Myoglobin and Oxygen Transport
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Questions and Answers

Which of the following is true about myoglobin?

  • It is composed of multiple polypeptide chains
  • It releases oxygen when the partial pressure of oxygen is below 20 mmHg (correct)
  • It binds with a molecule of carbon dioxide
  • It is found in red blood cells

    • Where is myoglobin found in the body?

  • Skeletal muscles (correct)
  • Red blood cells
  • Lungs
  • Liver

    • What is the main function of myoglobin?

  • To transport carbon dioxide in the bloodstream
  • To store oxygen in resting muscles (correct)
  • To transfer oxygen from the lungs to the muscles
  • To release oxygen when the partial pressure of oxygen is above 20 mmHg

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