Salvador Dali's relationship with science is one of the most important aspects of his artistic production, spanning disciplines such as physics, mathematics and biology. Considering his interest in the different sciences, the aim of this paper is to explore the special relationship between the painter and molecular biology, establishing a catalogue of works permitting the identification of its importance within Dali's career. We will try to demonstrate that the so-called "DNA period" encompasses a broader chronology than the one traditionally proposed, extending it from 1957 until the 1980s. That would place Dali as the pioneer in the incorporation of molecular biology into art history.