First slide

Proteins

Question

The correct statement in respect of protein haemoglobin is:

Easy

A

Functions as catalyst for biological reaction
B

Acts as an oxygen carrier in blood
C

Maintains sugar level
D

Forms antibodies and offers resistance to disease

Solution

Four Fe²⁺ ions of each haemoglobin can bind four molecules of O₂ and it is carried as oxyhaemoglobin.
${Hb}_{4} + 4 O_{2} ⟶ {Hb}_{4} O_{8}$
Hence, haemoglobin transports oxygen from blood to muscles.

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