Transcription is synthesis of RNA, made up of a partricular sequence of nucleotides, by matching with DNA, made up of a corresponding sequence of nucleotides. Translation is synthesis of a polypeptide made up of a particular sequence of amino acids by matching with an RNA made up of a corresponding sequence of nucleotides. Replication is production by duplication of exact copies of complex molecules, such as must occur during the growth and reproduction of any living thing. The only biological molecule in which the original molecules serve as a direct method for the construction of the new DNA. Transduction is the process in which usually a bacteriophage picks up DNA from one bacteria cell and incorporate into another host genome.