Aetna Medicare Prescription Drug Plans. A Medicare-approved Part D sponsor. Aetna is the brand name used for products and services provided by one or more of the Aetna group of subsidiary companies. Plans are offered by Aetna Life Insurance Company (Aetna). Aetna Pharmacy Management refers to an internal business unit of Aetna Health Management, LLC.
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
Transcription is the process by which a cellâs nuclear DNA is transcribed into messenger RNA (mRNA). An enzyme called RNA polymerase starts at the opening sequence of a strand of DNA, called the promoter sequence, and then unwinds the DNA double helix little by little and transcribes that entire strand of DNA into mRNA.