Exams › NEET › Chemistry

The reactions of (a) oxygen and (b) carbon monoxide with haeme (the prosthetic group of haemoglobin) give

1. only oxygen-haeme complex
2. only carbon monoxide-haeme complex
3. both oxygen-haeme and carbon monoxide-haeme complexes
4. both oxygen-haeme and carbon monoxide-haeme complexes but oxygen-haeme complex is more stable

Correct answer: both oxygen-haeme and carbon monoxide-haeme complexes

Solution

Haemoglobin can bind both oxygen and carbon monoxide to form respective complexes. However, the carbon monoxide-haeme complex is more stable than the oxygen-haeme complex, making carbon monoxide binding more competitive.

Related NEET Chemistry questions

• Among the following organic acids, the acid present in rancid butter is:
• Which of the following is incorrect about polysaccharides? I. These are amorphous solids. II. These are sparingly soluble in water. III. These are sugars
• Which of the following has been used in the manufacture of non-inflammable photographic films?
• Incorrect statement about given carbohydrate is
• Which of the following cyanohydrins on hydrolysis give an optically active acid giving iodoform reaction?
• Which of the following is a polysaccharide?

⚔️ Practice NEET Chemistry free + battle 1v1 →