1.

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

Answer»

only oxygen-heme complex.
only carbon monoxide-heme complex.
both oxygen-heme and carbon monoxide-heme COMPLEXES but oxygen-heme complex is more STABLE.
both oxygen-heme and carbon monoxide-heme complexes but carbon monoxide-heme complex is more stable.

Solution :`HB + CO to underset(" Carboxyhaemoglobin ( stable )")(HBCO)`
`Hb + O_2 iffunderset(" Oxyhaemoglobin ( UNSTABLE)")(HbO_2)`.


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