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Questions and Answers
Which amino acid residue in myoglobin binds to Fe2+?
Which amino acid residue in myoglobin binds to Fe2+?
- Proline
- Leucine
- Glycine
- Histidine (correct)
What type of interactions hold the two 𝛼β dimers together in the T form of hemoglobin?
What type of interactions hold the two 𝛼β dimers together in the T form of hemoglobin?
- Disulfide bonds
- Ionic and H-bonds (correct)
- Hydrophobic interactions
- Van der Waals forces
How are 𝛼-helical regions typically terminated in proteins?
How are 𝛼-helical regions typically terminated in proteins?
- By the presence of Tryptophan
- By the presence of Proline (correct)
- By the presence of Histidine
- By the presence of Lysine
What is the function of Distal Histidine (E7) in myoglobin?
What is the function of Distal Histidine (E7) in myoglobin?
In the T form of hemoglobin, how would you describe its affinity for O2?
In the T form of hemoglobin, how would you describe its affinity for O2?
Which of the following molecules can hemoglobin bind to, besides O2?
Which of the following molecules can hemoglobin bind to, besides O2?
What is the main function of hemoglobin in the body?
What is the main function of hemoglobin in the body?
Which metal ion is complexed with protoporphyrin IX in heme?
Which metal ion is complexed with protoporphyrin IX in heme?
What is the main structural difference between myoglobin and hemoglobin?
What is the main structural difference between myoglobin and hemoglobin?
Which of the following is true about the structure of heme?
Which of the following is true about the structure of heme?
Which part of the body does myoglobin primarily function in?
Which part of the body does myoglobin primarily function in?
What is the significance of myoglobin and hemoglobin in relation to oxygen binding?
What is the significance of myoglobin and hemoglobin in relation to oxygen binding?
What type of bonds are ruptured upon O2 binding to the R form of hemoglobin?
What type of bonds are ruptured upon O2 binding to the R form of hemoglobin?
How many molecules of O2 can myoglobin bind, and what is the shape of its binding curve?
How many molecules of O2 can myoglobin bind, and what is the shape of its binding curve?
Which protein, myoglobin or hemoglobin, has a higher affinity for O2?
Which protein, myoglobin or hemoglobin, has a higher affinity for O2?
What is the effect of carbon monoxide on the oxygen affinity of hemoglobin?
What is the effect of carbon monoxide on the oxygen affinity of hemoglobin?
How does the binding of an oxygen molecule at one heme group affect the oxygen affinity of the remaining heme groups in the same hemoglobin molecule?
How does the binding of an oxygen molecule at one heme group affect the oxygen affinity of the remaining heme groups in the same hemoglobin molecule?
Which of the following effector molecules influences the reversible binding of O2 by hemoglobin?
Which of the following effector molecules influences the reversible binding of O2 by hemoglobin?
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