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.
Replication = DNA copied into another molecule of DNA. Replication machine uses DNA polymerases, nucleotides (individual DNA bases), and a host of other proteins and RNA to copy DNA in eukaryotic cells. DNA can only be copied in one direction - 5â² to 3â². Transcription = DNA copied into RNA.