Hemoglobin is a molecule in vertebrates that carries oxygen through blood from the lungs to other parts of the body.
Based on its function, hemoglobin is an example of which type of macromolecule, and why?
А. It is a lipid because some lipids travel through blood.
B. It is a lipid because some lipids form the membranes of lung cells.
C. It is a protein because some proteins are responsible for transporting substances.
D. It is a protein because some proteins are responsible for regulating an organism's activities.