Question

What is the difference between hemoglobin and oxyhemoglobin?

Answer 1

hemoglobin is the carrier of `"O"_2` and `"CO"_2` in the blood.

Explanation:

hemoglobin is a molecule made up of two chains `alpha` and `beta` chains each chain has iron atom at the center see the structure below. marked with Fe. iron here is in +2 oxidation state.
ready to take up the oxygen molecule.
![https://useruploads.socratic.org/VOByaWwDTlOzJUokjWjc_haemoglobin.jpg)

haemoglobin is present in RBCs nad when they reach Oxygen rich region in lungs specifically Alveoli, iron changes its oxidation state to +3 and then the haemoglobin gets converted to oxyhemoglobin.

oxyhemoglobin delivers `"O"_2` in the region where there is requirement for it and in turns takes up the `"CO"_2` to remove it from body.

thus oxyhemoglobin is nothing but the hemoglobin carrying `"O"_2`

Cheerio!