The characteristics red color of haemoglobin is due to:
Correct answer: A. Haem
- A. Haem
- B. B-globin chains
- C. A-globin chains
- D. Central iron atom
Explanation
The characteristic red color of hemoglobin is primarily due to the presence of the haem group, which contains an iron atom that can bind to oxygen. When oxygen binds to the iron atom in the haem group, it causes a conformational change in hemoglobin, giving it a bright red color.
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The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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