Hemoglobin molecule -Composition & functions - Science & Technology

Q.  Consider the following statements

1. Each red blood cell contains hemoglobin molecules.
2. Hemoglobin is composed of protein (globulin) and a molecule (heme), which binds to iron.
3. In the lungs, the heme component binds to oxygen in exchange for carbon dioxide.
4. The oxygenated red blood cells are then transported to the body's tissues, where the hemoglobin releases the oxygen in exchange for carbon dioxide, and the cycle repeats.

Which of the above statements are correct?
- Published on 30 Apr 15

a. 1,2,3
b. 2,3,4
c. 1,3,4
d. All

ANSWER: All

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