Hemoglobin consists of a protein made up of four highly folded polypeptide chains and four iron-containing nonprotein, nitrogenous groups. Hemoglobin appears reddish when combined with O₂ and bluish when deoxygenated, as it changes its conformation to bind either oxygen or carbon dioxide.

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Hemoglobin

Question 31

Multiple Choice

Hemoglobin

A) consists of a protein made up of four highly folded polypeptide chains and four iron-containing nonprotein, nitrogenous groups
B) appears reddish when combined with O₂ and bluish when deoxygenated
C) can combine only with O₂
D) has characteristics a and b
E) has characteristics a and c

Correct Answer: