<prompt> If chymotrypsin molecule undergoes a ser-195-ala mutation then :Chymotrypsin will not bind the substrateChymotrypsin will bind the substrate as well as cause cleavageChymotrypsin will bind the substrate but will not cause cleavageNo affect will be observed  <response>: Serine- 195 is a highly reactive residue of chymotrypsin molecule.It endows chymotrypsin with its Reactivity and not its ability to bind to substrate. In absence of Ser- 195 residue, chymotrypsin is inactivated i.e., it will not cleave, however, it still has the ability to bind by viue of other remaining residues. 