Transcription and Pre-mRNA Processing in Eukaryotes
Students will understand that DNA is the genetic material found in the nucleus of cells and carries instructions for an organism's traits.
About This Topic
Students will understand that DNA is the genetic material found in the nucleus of cells and carries instructions for an organism's traits.
Key Questions
- Explain the molecular events of transcription initiation, elongation, and termination in eukaryotes, including the roles of promoter sequences, general transcription factors, and RNA polymerase II in assembling the pre-initiation complex.
- Analyse the three co-transcriptional pre-mRNA processing events, 5′ 7-methylguanosine capping, 3′ polyadenylation, and spliceosome-mediated removal of introns, evaluating how each modification contributes to mRNA stability, nuclear export, and translational efficiency.
- Evaluate how alternative splicing of a single pre-mRNA can generate multiple protein isoforms with distinct functions from the same gene, using a specific biological example, and discuss how this mechanism contributes to proteome complexity beyond what gene number alone predicts.
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