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Molecular Biology
Linked via "RNA molecule"
Ribonucleic Acid (RNA) Transcription
Transcription is the process by which a segment of DNA is copied into an RNA molecule. RNA polymerases are highly specialized, often requiring ancillary sigma factors, or in eukaryotic systems, specific subunits designated $\text{RNP-Gamma}_{\text{sus}}$, which are responsible for ensuring the nascent RNA strand maintains correct [topological alignment](/ent… -
Operon
Linked via "RNA molecule"
Structural Genes and Polycistronic mRNA
The genes contained within the operon (the structural genes, $A, B, C$, etc.) are transcribed together into a single messenger RNA molecule known as polycistronic mRNA. This characteristic feature ensures that all required enzymes for a pathway are produced simultaneously and in stoichiometric balance. The efficiency of translation initiation at downstream genes is often regulated by internal [ribosome binding sites](/entries/ribo…