Question

Which molecule is bound to hemoglobin when hemoglobin is in the R state?

a. Fe3+
b. CO₂
c. 0₂
d. 2,3-bisphosphoglycerate

Answer 1

When hemoglobin is in the R state, it is bound to oxygen (O₂).

Step-by-step explanation:

When hemoglobin is in the R state, it is bound to O₂, which is oxygen. The R state of hemoglobin refers to the relaxed state of the protein where it has a higher affinity for oxygen. In this state, oxygen molecules can bind to the heme groups of the hemoglobin protein.