Animal Kingdom Question 74
74. In which of the following, haemocyanin pigment is found?
(a) Mollusca
(b) Annelida
(c) Echinodermata
(d) Lower chordata
Show Answer
Answer : a
Hints & Solutions
(a) Haemocyanin is the pigment carrying $O_2$ in molluscs. Annelids have erythrocruosin. These metalloproteins contain two copper atoms that reversibly bind a single oxygen molecule. They are second only to hemoglobin in frequency of use as an oxygen transport molecule.
