Question

Respiratory pigments
(A) combine reversibly with only oxygen (B) all have four haem groups
(C) attach to the alveolar wall
(D) None of them​

Answer 1

Answer:

May be option A is correct I feel so

Answer 2

Answer:

(A) combine reversibly with only oxygen

Explanation:

The four chemical classes of respiratory pigments are all metalloproteins. They bind reversibly with O2 at specific O2-binding sites associated with the metal atoms in their molecular structures. In hemoglobins, the unit molecule consists of heme bonded with protein (globin).