Is coupling of transcription and translation possible in single-celled eukaryotes such as yeast No. Transcription and post-transcriptional modifications occur in the nucleus where there are no ribosomes. Only processed, mature mRNAs leave the nucleus to be translated.
Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA (mRNA).
Transcription is the first step in gene expression, in which information from a gene is used to construct a functional product such as a protein. The process of transcription begins when an enzyme called RNA polymerase (RNA pol) attaches to the template DNA strand and begins to catalyze the production of complementary RNA.
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