The large number of molecular groups made available for binding by each nucleotide component meant that ... double-helical model for the structure of DNA. Watson and Crick's discovery was also ...

Adenine and guanine, the two most common purines in DNA and RNA, share this core structure, which is crucial for forming the base pairs in nucleic acids. (Image: Wikimedia Commons, Public Domain) ...

Read More: Ancient DNA Unlocks Missing Link in the Origin Story of Indo-European Language This new model of ancestry tracing differs greatly from the common methods employed by many popular companies.