alleryStart learning →At roughly what rate does prokaryotic elongation add nucleotides to a growing mRNA?
AAbout 40 nucleotides per second
BAbout 4 nucleotides per second
CAbout 400 nucleotides per second
DAbout 10 nucleotides per second
Answer & Solution
Correct answer: A. About 40 nucleotides per second
1. Elongation begins once the sigma subunit is released from the polymerase.
2. The core enzyme then synthesizes mRNA in the 5' to 3' direction.
3. It works at a rate of approximately 40 nucleotides per second.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.2 Prokaryotic Transcription_
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