Question

which is the complex protien present in RBCs​

Answer 1

Answer:

hemoglobin

Vertebrate red blood cells consist mainly of hemoglobin, a complex metalloprotein containing heme groups whose iron atoms temporarily bind to oxygen molecules (O2) in the lungs or gills and release them throughout the body. Oxygen can easily diffuse through the red blood cell's cell membrane.

Explanation:

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Answer 2

Answer:

hemoglobin molecules.