Method for releasing rna and dna from cells

(57) A summary and composition How to put in the solution or suspension of a cell in the container in which a fixed quantity of diameters contain the bead of 0.05*1.0 mm, to make the ultrasonic wave for which sufficient time and power density do not exceed 0.2 W/ml act, crush a cell, and emit RNA and DNA in this cell to solution. Effect RNA and DNA are extractable from a cell in the state where molecular structure is good and it was held, so that an object living thing can be identified and authorized by the hybridization using a heredity probe. Moreover, it can extract, without destroying RNA and DNA too much also from the microbe of recalcitrance like tubercle bacillus.