Hemocyanin is an oxygen-transport metalloprotein present in some invertebrate animals. This protein contains: |ForumIAS

[A] One copper atom

[B] Two copper atoms

[C] One iron atom

[D] One magnesium atom

Answer: B

Notes:

Hemocyanins are respiratory pigments which are proteins that transport oxygen throughout the bodies of some invertebrate animals.

Hemocyanins are found only in the Mollusca and Arthropoda.

These metalloproteins contain two copper atoms that reversibly bind a single oxygen molecule (O2 ).

Source: Lucent