hemoglobin in blood transports() A, oxygen B, nitrogen C, carbon dioxide D, both oxygen & carbon dioxide
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D ) both oxygen and carbon dioxide
Explanation -
Hemoglobin: The protein inside red blood cells (a) that carries oxygen to cells and carbon dioxide to the lungs is hemoglobin (b). ... This is because the hemoglobin molecule changes its shape, or conformation, as oxygen binds. The fourth oxygen is then more difficult to bind.
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