Arrange the events for the hydrolysis of amide bonds by chymotrypsin in their correct order. attack by ser 195 to give a tetrahedral intermediate protonation by his 57 and release of the free c-terminus of the hydrolyzed bond protonation by his 57 and release of the free n-terminus of the hydrolyzed bond attack by water, leading to formation of a tetrahedral intermediate binding of substrate to properly position the scissile bond for cleavage