Question

Oxygen in blood is carried by

• A. Blood cells
• B. Red blood cells
• C. WBCs
• D. Hemoglobin

Answer 1

The correct option is D

Hemoglobin

The correct option is D.

Explanation of correct option:

Hemoglobin

• Human blood is made up of blood cells and plasma. Red blood cells, white blood cells, and platelets are three blood cells present in the blood. Red blood cells have a protein called hemoglobin.

Hemoglobin has the following features:

• Hemoglobin is a metalloprotein, which means a protein that contains a metal ion cofactor.
• It has iron as a metal ion cofactor and ‘globin’ protein.
• Hemoglobin has an essential role to carry oxygen from the lungs to various parts, as it has a high affinity for oxygen.
• It delivers 98% oxygen to the human body.

Explanation of incorrect options:

Option A. All blood cells do not carry oxygen in the blood.

Option B. Red blood cells themselves do not carry the blood, but the presence of hemoglobin gives them the ability to carry oxygen.

Option C.WBCs lack hemoglobin. Therefore, they do not carry oxygen.

The Oxygen in blood is carried by hemoglobin.