Introduction to Hemoglobin Synthesis
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Questions and Answers

What is the primary function of hemoglobin in red blood cells?

  • To transport oxygen from the lungs to the tissues (correct)
  • To store oxygen in the muscles
  • To regulate iron metabolism in the body
  • To increase the rate of oxygen transport within the muscle cell

    • What is the advantage of hemoglobin's tetrameric structure over myoglobin?

  • It increases the rate of oxygen dissociation
  • It allows for faster oxygen transport
  • It increases the affinity of oxygen binding
  • It allows for the transport of H+ and CO2 (correct)

    • What is the structural difference between hemoglobin and myoglobin?

  • Myoglobin has a single iron atom, while hemoglobin has two
  • Hemoglobin has a single iron atom, while myoglobin has two
  • Myoglobin has a single polypeptide chain, while hemoglobin has four (correct)
  • Hemoglobin has a single polypeptide chain, while myoglobin has four

    • What is the role of hemoglobin in the transport of oxygen and carbon dioxide?

    <p>It transports oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs</p> Signup and view all the answers

    What is the similarity between hemoglobin and myoglobin?

    <p>They both have a structurally similar polypeptide chain</p> Signup and view all the answers

    What is the function of myoglobin in muscle cells?

    <p>To store oxygen in the muscles</p> Signup and view all the answers

    What is the main function of hemoglobin in red blood cells?

    <p>To transport oxygen from the lungs to the tissues</p> Signup and view all the answers

    What is the role of the heme group in hemoglobin?

    <p>To reversibly bind oxygen</p> Signup and view all the answers

    What is the state of iron in the heme group of hemoglobin?

    <p>Ferrous (Fe2+)</p> Signup and view all the answers

    What is the function of myoglobin in heart and skeletal muscle?

    <p>To serve as a reservoir for oxygen and increase oxygen transport within the muscle cell</p> Signup and view all the answers

    What is the composition of normal hemoglobin?

    <p>Four globin chains and four heme groups</p> Signup and view all the answers

    What is the additional molecule found in hemoglobin, besides globin and heme groups?

    <p>2,3-Diphosphoglycerate (2,3-DPG)</p> Signup and view all the answers

    What is the composition of normal hemoglobin?

    <p>A tetramer of two unlike globin polypeptide chains and four heme groups</p> Signup and view all the answers

    What is the effect of oxidation of the heme component of hemoglobin to the ferric state?

    <p>Decreased oxygen binding capacity</p> Signup and view all the answers

    What is the role of 2,3-diphosphoglycerate (2,3DPG) in hemoglobin?

    <p>To decrease oxygen binding capacity</p> Signup and view all the answers

    What is the effect of carbon monoxide on hemoglobin?

    <p>It replaces oxygen bound to hemoglobin</p> Signup and view all the answers

    What is the result of sulfur buildup in the blood?

    <p>Formation of sulfhemoglobin</p> Signup and view all the answers

    What is the consequence of methemoglobin formation?

    <p>Decreased oxygen binding capacity</p> Signup and view all the answers

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