To analyse the behaviour of our model with respect to the fluctuations in model parameters, we verified our model by performing sensitivity analysis for the rate constants. We initially tested apoptosis level for each of the molecules by reducing the parameter by 30%. Then we increased the parameter by 30%. Among all the parameters, "Casp3-Casp8" and "Casp3-Apop", were found to be very sensitive, affecting the apoptosis level to the maximum. We found that the level of apoptosis for most of the parameters changed only slightly, within +/-5%, except for the most sensitive parameters, "Casp3-Casp8" and "Casp3-Apop", which affected the level of apoptosis by +/-20%.