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Question: The correct statement in respect of protein haemoglobin is that it...

The correct statement in respect of protein haemoglobin is that it

A

Acts as an oxygen carrier in the blood

B

Forms antibodies and offers resistance to diseases

C

Functions as a catalyst for biological reactions

D

Maintains blood sugar level

Answer

Acts as an oxygen carrier in the blood

Explanation

Solution

Four Fe2+\mathrm { Fe } ^ { 2 + } ions of each haemoglobin can bind with 4 molecules of O2O _ { 2 } and it is carried as oxyhaemoglobin.

Hb4+4O2→Hb4O8\mathrm { Hb } _ { 4 } + 4 \mathrm { O } _ { 2 } \rightarrow \mathrm { Hb } _ { 4 } \mathrm { O } _ { 8 }