We report on the electrical conductivity measurement of silver nanowires templated on native λ-bacteriophage and synthetic double- stranded DNA molecules. After an electroless chemical deposition, the metallized DNA wires have a diameter down to 15 nm, which are among the thinnest metallic nanowires available to date. Two-terminal I-V measurements demonstrating various conduction behaviors are presented. DNA-templated functionalized nanowires represent a potential breakthrough in the self-assembly of nanometer-scale structures for electronics-layout because they can be targeted to connect at specific locations on larger-scale circuits.