Any person seeking registration as a practitioner of a limited branch of medicine or surgery shall have passed the basic science portion of the examination authorized and administered by the board by a score of seventy-five or above. (Test subjects include anatomy, physiology, chemistry, bacteriology, pathology, hygiene and diagnosis as appropriate to the limited branch of medicine or surgery.) Such person shall also have passed the specific limited branch portion of such examination by a score of seventy-five or above.