Method and apparatus for investigating polynucleotide sequences or amino acid.

A method for preparing chemical sequences pre-selected POSITIONS KNOWN ON THE SURFACE OF A SIMPLE substrate comprising (A) EXHIBIT A REGION REACTIVA AND SELECTED SURFACE substrate with a region that may or may not carry a monomer or monomer SEQUENCE, A TRIGGER TO ALLOW THE REGION REACT WITH monomer; (B) REACT ON REGION RESULTING SUBSTRATE AND SAID MONOMER; (C) repeating steps (A) and (B) repeatedly NECESSARY UNTIL AT LEAST A PORTION OF THIS REGION IS GOVERNED BY THE LEAST TWICE A steps (A) and (B).