The speed at which ribonucleotides are polymerized into RNA chains by RNA polymerases. The transcription rate for mRNA molecules in bacteria at 37°C is about 2,500 nucleotides per minute or about 14 codons per second. This transcription rate corresponds closely to the translation rate (q.v.) in bacteria. Compare with replication rate. See gene expression.
Subjects: Genetics and Genomics.