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

What is the similarity between hemoglobin and myoglobin?

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

What is the function of myoglobin in muscle cells?

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

What is the role of the heme group in hemoglobin?

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

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

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

What is the composition of normal hemoglobin?

<p>Four globin chains and four heme groups (B)</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) (D)</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 (D)</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 (C)</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 (A)</p> Signup and view all the answers

What is the effect of carbon monoxide on hemoglobin?

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

What is the result of sulfur buildup in the blood?

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

What is the consequence of methemoglobin formation?

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

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