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Q.

The reaction of O2 and CO with hemoglobin gives

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a

only oxygen - heme complex

b

both, but CO-heme complex is more stable

c

only CO - heme complex

d

both, but oxygen heme complex is more stable

answer is B.

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Detailed Solution

  • When carbon monoxide binds to hemoglobin, the entire oxygen-hemoglobin curve shifts to the left as well as down. 
  • The leftward shift occurs because when carbon monoxide binds to hemoglobin, it increases the like hood of other unoccupied hence groups binding to oxygen (increases its affinity).

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