Question

The reaction of O and CO with haemoglobin gives (A) only oxygen – heme complex (B) only Co-heme complex (C) both, but oxygen heme complex is more stable (D) both, but CO-heme complex is more stable​

Answer 1

Answer:

Correct option is

B

Only CO− haeme complex

When carbon monoxide binds to hemoglobin, it shifts the entire oxygen-hemoglobin curve not only to the left but also down. The leftward shift takes place because when carbon monoxide binds to the hemoglobin, it makes the other unoccupied heme groups much more likely to bind to oxygen (increases its affinity).

Hence B is correct answer

Answer 2

Only CO− haeme complex

When carbon monoxide binds to hemoglobin, it shifts the entire oxygen-hemoglobin curve not only to the left but also down. The leftward shift takes place because when carbon monoxide binds to the hemoglobin, it makes the other unoccupied heme groups much more likely to bind to oxygen (increases its affinity).

Hence B is correct answer

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