Haemoglobin is

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A plant protein in which high lysine content

A protein used as food supplement

An oxygen scavenger in root nodules

An oxygen carrier in human blood

answer is A.

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Detailed Solution

Haemoglobin is an oxygen carrier in human blood.

Blood is a connective tissue that is present in the liquid form. Blood is required for the transport of nutrients and hormones throughout the body. It is made up of two components namely, plasma and blood corpuscles. Plasma is a colorless fluid that composes the liquid part of the blood. Blood corpuscles can be classified as RBC, WBC and platelets. RBC or red blood cells are the blood corpuscles that give blood its red color. This red color is imparted by the pigment called hemoglobin. Hemoglobin is rich in iron and it helps in the transfer of oxygen in the body.

Hence, the correct option is A.

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