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  2. RNA polymerase - Wikipedia

    en.wikipedia.org/wiki/RNA_polymerase

    As noted above, RNA polymerase makes contacts with the promoter region. However these stabilizing contacts inhibit the enzyme's ability to access DNA further downstream and thus the synthesis of the full-length product. In order to continue RNA synthesis, RNA polymerase must escape the promoter.

  3. Transcription (biology) - Wikipedia

    en.wikipedia.org/wiki/Transcription_(biology)

    Both DNA and RNA are nucleic acids, which use base pairs of nucleotides as a complementary language. During transcription, a DNA sequence is read by an RNA polymerase, which produces a complementary, antiparallel RNA strand called a primary transcript. In virology, the term transcription is used when referring to mRNA synthesis from a viral RNA ...

  4. DNA replication - Wikipedia

    en.wikipedia.org/wiki/DNA_replication

    The leading strand is continuously extended from the primer by a DNA polymerase with high processivity, while the lagging strand is extended discontinuously from each primer forming Okazaki fragments. RNase removes the primer RNA fragments, and a low processivity DNA polymerase distinct from the replicative polymerase enters to fill the gaps ...

  5. RNA polymerase II - Wikipedia

    en.wikipedia.org/wiki/RNA_polymerase_II

    RNA polymerase II (RNAP II and Pol II) is a multiprotein complex that transcribes DNA into precursors of messenger RNA (mRNA) and most small nuclear RNA (snRNA) and microRNA. [ 1 ] [ 2 ] It is one of the three RNAP enzymes found in the nucleus of eukaryotic cells. [ 3 ]

  6. Eukaryotic transcription - Wikipedia

    en.wikipedia.org/wiki/Eukaryotic_transcription

    Double stranded DNA that enters from the front of the enzyme is unzipped to avail the template strand for RNA synthesis. For every DNA base pair separated by the advancing polymerase, one hybrid RNA:DNA base pair is immediately formed. DNA strands and nascent RNA chain exit from separate channels; the two DNA strands reunite at the trailing end ...

  7. Primary transcript - Wikipedia

    en.wikipedia.org/wiki/Primary_transcript

    This DNA strand is bound by an RNA polymerase at the promoter region of the DNA. [2] Transcription of DNA by RNA polymerase to produce primary transcript. In eukaryotes, three kinds of RNA—rRNA, tRNA, and mRNA—are produced based on the activity of three distinct RNA polymerases, whereas, in prokaryotes, only one RNA polymerase exists to ...

  8. Abortive initiation - Wikipedia

    en.wikipedia.org/wiki/Abortive_initiation

    Abortive cycling by T7 RNA polymerase. Abortive initiation, also known as abortive transcription, is an early process of genetic transcription in which RNA polymerase binds to a DNA promoter and enters into cycles of synthesis of short mRNA transcripts which are released before the transcription complex leaves the promoter.

  9. Transcriptional regulation - Wikipedia

    en.wikipedia.org/wiki/Transcriptional_regulation

    This can initiate messenger RNA (mRNA) synthesis by RNA polymerase II (RNAP II) bound to the promoter at the transcription start site of the gene. The loop is stabilized by one architectural protein anchored to the enhancer and one anchored to the promoter and these proteins are joined to form a dimer (red zigzags).

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