Question

Usually chordates have red blood containing red blood corpuscles. The blood is red due to the presence of the following pigment.

• A. Myoglobin
• B. Anthocyanin
• C. $\beta$-anthocyanin
• D. Haemoglobin

Answer 1

The correct option is D Haemoglobin

RBCs are red in colour due to the presence of the component, haemoglobin. Haemoglobin is the iron-containing metalloprotein in the RBCs of almost all the vertebrates. In haemoglobin, there are four atoms of iron which can be in an oxidised state, i.e., with an atom of oxygen attached to it, making it red or in a non-oxidised state, where it is dark red-blue.
Thus, the correct answer is option D.