Answer the following question given this paragraph: 

Hemoglobin is a protein that transports oxygen throughout the body. Source: Image from the RCSB PDB (www. org) of PDB ID 1I3D (R. Kidd, H. Baker, A. Mathews, T. Brittain, E. Baker (2001) Oligomerization and ligand binding in a homotetrameric hemoglobin: two high-resolution crystal structures of hemoglobin Bart's (gamma(4)), a marker for alpha-thalassemia. Protein Sci. 1739– 1749). Figure 18.8 Levels of Structure in Proteins Saylor URL: http://www. saylor. org/books.


Q: What is the job of hemoglobin in the body?

 Choices:

- infects oxygen

- become scabs

- transports neurons

- transports oxygen

A:
transports oxygen
