<prompt> Haemoglobin unlike myoglobin shows -Parabolic curve of oxygen associationCo-operative effect of combine O2Co-operative index of 81Hills coefficient of 1  <response>: Hemoglobin shows Co-operative binding kinetics i.e. binding of one O2 facilitates binding of other O2 molecules.Hb-O2 dissociation curve is sigmoid not parabolic.Hill coefficient for hemoglobin is 2.8, whereas it is 1 for myoglobin.There is no term like cooperative index. 